# What focal length is Google Earth?

In Google Earth

# What is focal length?

focal length is the distance between your optic nerve and the retins in lense the distance between the optical and focus

# What is the Focal length of a plane mirror?

Infinity.because the distance of object from mirror"p" and the distance from image to mirror"q" are equal,so by using formula 1/f=1/p+1/q we can find the answer as the image of plane mirror is virtual,so"q" is taken negative,so putting values 1/f=1/p-1/p(bcz p=q) 1/f=0 f=1/0 and any th…ing divided by zero is infinity. ( Full Answer )

# What is the ideal focal length for a satellite dish?

Infinity. Space is so far away from the dish that using a focal length of infinity is standard. Any focus adjustment is merely to account for changes in temperature of the dish (or telescope).

# Why is the power of a lens the reciprocal of its focal length?

Optical power is the degree to which the lens will converge ordiverge light. The unit of measurement is the diopter and isdirectly related to how much a beam of light is bent by the lens.

# How do you calculate focal length?

A very simple method to calculate the focal length of a lense is to focus it front of the sun and find out a sharp, small point at ground and you have to calculate the distance between that point and lense.... However this gives you approximate result not very accurate resut... For accurate result y…ou have to go in to physics lab and work with optical bench... Thanks ( Full Answer )

# Why is the focal length of a plane mirror infinity?

In a plane mirror, the radius of curvature is infinitly long, so the focus will be at infinity. Another way to say it is that a plane mirror has no curvature, and as curvature becomes increasingly small, focal length becomes increasingly long. At a curvature of zero, focal length becomes infinite. … Focal length(f) is given by f=R/2 where R is radius of curvature.. Once again, it's infinity! See answer to your question on radius of curvature. Plug infinity (radius of curvature) into your mirror equation to get the focal length, which will also be infinite. A flat mirror does not focus incoming parallel beams. That's because if you say its at infinity it means it does exist in a finite distance, that is instead of saying it does exist its taken at infinite distance for only theoretical importance and not for practical observance. Focal length is half of radius of curvature of the mirror. So bigger the circle gets the more its radius will be. So in the same way as the curvature of the sphere gets less and less its focal length increases, so when it becomes totally flat the focal length will become infinite so it means it has no existence but it has only theoretical importance. It same as taking the formation of image of an object at principal focus to be at infinite distance rather than saying it does not form ( that is both mean the same). hope my answer is satisfactory ( Full Answer )

# How does the thickness of a lens effect its focal length?

\nFor convergent lenses identical in every other respect, the thicker lens will have a shorter focal length.

# What is the medical application of the focal length?

By using the science of focal length, doctors are able to performultrasound focal beam surgery. This surgery is used in places suchas the brain where tissue and cell damage must be minimal.

# How do you measure a focal length?

The formula for focal length is given byÃ1 divided by 1/a plus 1/b,where 'a' is the distance to a lamp or light source and 'b' is thedistance to the wall. You find the focal length by placing a lensparallel to a white wall and focus a light source through the lensuntil one gets a clear image. The… lamp has to be positioned so thatit is close to the optical axis of the lens. ( Full Answer )

# What is the power lens which has a focal length 20cm?

Converging/diverging power = 1 / focal length = 1 / 0.20 = 5 per meter = 5 diopters

# What is a focal length?

it is the distance a lense is from an object in order for it to be in focus

# How do you get to Google Earth?

By taking the google spaceship from google mars. Kidding aside, you can either visit the google earth web page to download & install Google Earth desktop client or simply install the web browser plugin.

# What is googl earth?

Google earth is a thing where you can look at places all over the globe. If you want to go on something similar to Google earth go on Google.com and click maps and if you type in an address and zoom in on the map you can see the place that you have typed in

# How do you measure focal length on view camera?

Focal length refers to the distance from a point within a lens to the film plane when the lens is focused on infinity. For a 50mm lens, this point (rear nodal point) is 50mm away from the film plane if the lens is focused on infinity. An image on the ground glass of a view camera is focused by ra…cking the lens board towards or away from the glass, but the principle is the same. The rear nodal point of a 250mm lens will be that distance from the glass when focused on very distant objects. It is virtually impossible to physically measure the focal length if that's what you're trying to do, since the rear nodal point is contained within the rear optic. If you're trying to calculate it, that's a subject beyond me, and perhaps the photography category also. In that case, you might want to try asking somewhere over in the Physics category. ( Full Answer )

# Difference between focal point and focal length?

The focal point is the point where light converges after it passes through a concave lens. The focal length is the distance of the focal point to the lens. Same for a convex lens, except that the focal point is the imaginary point from where light deflected from lens seems to have emerged.

# How you can find focal length of plane?

Are you sure about this? In my book, the only things to have focal lengths are lenses and other optical imaging systems.

# What is the Focal length of a concave mirror?

It is the point , on the central axis, where light, that is parallel to the central axis, passes thru after it is reflected from the mirror..
It is also at a distance from the mirror equal to twice the radius of curvature of the mirror.

# What's the difference between focal length and focal distance?

Focal length is effective focal length of lense system, focal distance is distance (from some point in system) to focused picture. Strictly speaking, this varies as object moves nearer from infinity to system. In case of single (thin) lense, focal length is the same as focal distance from the lense,… when object is in infinity. In case of teleobjective, mirror telescope etc., focal length can be much larger than the length of the optical system. Then it is convenient to define e.g. BFL = Back focal length, which is the distance from last lense to focus point. Correspondingly, wide-angle camera lenses have much larger focal distance (and BFL) than focal length in order to give space for lifting mirror in SLR cameras. ( Full Answer )

# How would you find the focal length of lens?

Have light from a very distant object directed through the lens onto an opaque, white surface. Change the distance from the lens to the projection surface until the distant object shows a sharp image on the surface. The distance from the lens to the surface at that point is the focal length.

# How can you tell what the focal length is for a lens?

Easy way: Use it to form an image of the sun or moon, and measure the distance of the image behind the lens..
When the object is at infinity, the distance between the lens and the image is the focal length of the lens.

# How to determine the focal length of group of lenses?

Measure the distance from the center of the lens to the area where it 1.)Produces a clear image of very distant objects, 2.) The Sun (Be careful!), 3.) The Moon, 4.) A bright star or planet..
The source needs to be at or near infinity. If you use a light source that is close to the lens, your resul…ts will not be accurate. Of course, if you know the F ratio, you have it! An F/2 lens will be twice the diameter of the lens. An F/10 will be ten times, etc. ( Full Answer )

# What is the focal length of goggles?

Goggles purchased "off the shelf" should not be refractive, i.e. should not have a 'focal length'. I suppose if you're a die-hard compulsive SCUBA diver, you could buy prescription goggles; then their focal length would be whatever suits your prescription. But for anything bought in a sports supply,… if it has a focal length, then you're on the road to eye-strain ... take it back ! ( Full Answer )

# What is the meaning of focal length in a camera lens?

The focal length of a camera's lens refers to the the magnification or telephoto power of the lens and is expressed in the millimeters of the lens, like 100mm, 300mm, etc. .
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# Why does the lens on a camera have a short focal length?

The short focal length of a camera lens is so that the image the lens forms is small and can be focused on a piece of light-sensitive film.

# What is Google Earth and Google Maps?

Google Earth is a 3D earth viewer (run as desktop or mobile application) and Google Maps is a web-based 2-D map viewer with street and satellite views. For desktop platforms, Google Earth is a standalone application that first must be installed while Google Maps is run from a web browser. Client a…pps exist for both on some mobile platforms so that the distinction between the two gets blurred. Both Google Earth and Google Maps share the same Google global imagery database with satellite and aerial imagery including Street View photographs. ( Full Answer )

# How can you calculate the focal length of a lens?

Basically, the focal length is the distance from the center of the lens to the focal point or the principal foci. The calculations will depend on the curvature of the lens, the lens thickness, and the refractive index of the material that the lens was made out of. Wikipedia has a great descriptio…n of lens focal length, see the link to this article in the related link section below. ( Full Answer )

# How to find out the focal length of a telescope for lens?

For most purchased telescopes, the focal length of the objective lens will be printed on the lens' mounting ring, and it will definitely be stated somewhere on the packing box and in the literature that comes with it. The focal length of any unknown lens can be measured by using the sun, the …moon, or a distant street-light at night. Focus an image of the distant light, through the lens, and onto a piece of white paper or tissue. The distance between the lens and the sharpest image is the focal length of the lens. Technically, the object must be infinitely far away. So the farther the light source is, the more accurate the measurement is. That's why it's good to use the sun or the moon as the source. ( Full Answer )

# What effect does focal length have on Depth of field?

Longer focal lengths produce less depth of field than short ones. If you search, you will probably find sites that claim the difference is negligible in most cases. It seems they think that (for example) the perception that a telephoto lens has much less depth of field is due to how that lens compre…sses the same distance into a smaller area of the print. In other words, the distance is the same, it just looks to be less. I think that if you compare the distance scale of a long and short lens, referring to the same aperture and focus distance, the scale will show the wide angle lens has way more depth of field than a telephoto. I would side with the lens manufacturer in the hope they know what they're doing. ( Full Answer )

# How does the focal length of the human eyeball change?

The "eyeball" doesn't have a focal length, any more than the body of a camera or the tube of a telescope have. It's the lenses (or mirrors) in the eye, camera, and telescope that have focal lengths. In the eye, the focal length of the lens changes when the shape of the lens changes ... becomi…ng flatter or thicker in the center. That change is accomplished by muscles around the circular edge of the lens. They stretch the lens to flatten it, and relax to thicken it, when you shift your focus to longer or shorter distances. ( Full Answer )

# What website from Google is Google Earth?

Some websites use the Google Earth plugin and visiting such awebsite would prompt you to download the plugin from Google if youdon't already have Google Earth plugin installed. This is installedwhen you install the Google Earth application. If you want to download the Google Earth application it ca…n bedownload for free from the Google Earth website, whose URL can befound in related links below. Otherwise just search: "D ownloadGoogle Earth" and the first result with the website from thedomain earth.google.com is the one to use (after the ads). ( Full Answer )

# What is the focal length of sunglasses?

The focal length of a Sunglass lens is theoretically infinite. It is because the radii of curvatures of the front and back surfaces are equal.

# What factors can affect the focal length of a lens?

There are many factors affecting the focal length of a lens, these include: - The thickness of a lens. - The curviture of a lens. - The material the lens is made out of. E.g. Glass or plastic. - The light intensity going through the lens. - The shape of the lens. These, are just few of the many fa…ctors that may affect the focal length of a particular lens. I hope this has helped. ( Full Answer )

# What is the define the focal length of a convex lens?

The focal length is the sicence that deals with when make this image on the screen about disruption or clear and we can use it in the field of elicrical technology and etc...

# Do near objects have a longer focal length?

Focal length is related to the lens.Â It has nothing to do with how near or far the object is to the lens or objective.

# Does focal length determine the image quality?

No, just changes the distance required between the lens and the screen in order to get a good picture. BUT it does not affect image quality.

# What is the value of focal length of plane mirror?

Infinity.because the distance of object from mirror"p" and the distance from image to mirror"q" are equal,so by using formula 1/f=1/p+1/q we can find the answer as the image of plane mirror is virtual,so"q" is taken negative,so putting values 1/f=1/p-1/p(bcz p=q) 1/f=0 f=1/0 and any th…ing divided by zero is infinity. .
hope this helps . ( Full Answer )

# What are the factors affect on focal length of lens?

There are three factors affecting the focal length of a lens. 1. refractive index of the material of lens. 2. refractive index of the surrounding medium 3. the radius of curvature of the lens surfaces.

# What is a wide angle focal length lens?

With a 35mm sensor a wide angle is 24mm to 35mm and a wide angle is below 24mm.

# What is the relation of focal length of eye with its curvature?

More the curvature of the eye lens, lesser the focal length is. Lesser the curvature, greater the focal length is

# What does Google describes Google Earth as?

Google describes Google Earth as a tool " allowing you to travel the world through a virtual globe and view satellite imagery, maps, terrain, 3D buildings, and much more. " They also say " Google Earth is simply your ticket to explore the Universe ". .
The latter claim is because Google Earth is… not limited to Earth with Mars, Moon, and Sky modes.. ( Full Answer )

# What is the focal length formulae?

For a lens ... 1 / image distance + 1 / object distance = 1 / focal length of the lens

# Why is power is used as reciprocal of focal length?

The tendency to converge the rays decides the power factor. So shorter the focal length converging is tremendous. Hence power is reciprocal of focal length

# Can the focal length of a lens be equal to its radius?

Radius of cuvature = 2 x focal length So both cannot be equal in any way

# How is Focal length measured in terms of light?

There are quite a few methods available to measure focal length, some of which are: using quick estimates, Nodal Slide mode, Talbot and Cornu. The easiest and fastest method to use would be the estimate method whereby you hold the lens under a light and manouver the lens until one sees the clear an…d sharp image of the light on the floor or the surface underneath the lens and then measure the distance from the lens to the surface. This method is not precise but brings to a close measurement for a particular lens. The other methods require equipment and math aptitude for calculation. ( Full Answer )

# How can you find focal length of a converging lens?

You can place the length in the sunlight, see where the light converges, and measure the distance.

# What is the focal length of a lens?

The focal length of a lens refers to the distance from the centreof the lens to the principal foci.

# Whats the focal length of a lens?

The focal length of a lens is the distance from the principal focito the center of the lens.

# Why does a convex mirror have a negative focal length?

Basically because, in a convex mirror, the curvature is the opposite of that of a concave mirror. It's bevaviour is opposite, too: incoming light is spread out, instead of being focussed.

# What is the meaning of focal length in camera?

Lenses with focal lengths less than 50mm are referred to as wide-angles - simply because they have a wider angle of view. Lenses with focal lengths greater than 50mm are known as telephotos, and these offer greater magnification thanks to their much narrower angle of view.

# What will decreasing a telescope's eyepiece focal length?

With a smaller focal length the eyepiece produces moremagnification but a smaller field of view.