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The angular diameter of an object is inversely proportional to its distance from the observer?
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What is the redshift star?
The redshift is caused by relative motion that increases the distance from the source to the observer. The faster the source of light is moving away to the observer, the greater the redshift
How can a person measure vast distance such as the depth of a deep ocean or the diameter of the earth?
The depth of the ocean can be measured using principles such as sonar wherein a wave with a known speed is projected towards the bottom surface and the time lapsed until the wave returns is divided by two and them multiplied by the speed of the wave in order to calculate the distance traveled in one direction. The diameter of the earth can be calculated numerous ways, one of which is to measure the change in angle of the earth between two points (e.g. the change in apparent height of a ship at sea level as the distance from the observer increases) and then extrapolate the total circumference of the earth, diameter can then be solved for by dividing the circumference by Pi.
Why doesn't the Doppler shift appear when an observer moves toward the source?
Doppler's effect does not happen when the observer is moving towards the source because unlike the source when observer moves forward the waves are not compressed and they pass the observer without being compressed and since the doppler effect is due to the Change in wavelength of the wave, it fails to occur.
The sun angle is the angular distance from the observer's horizon to the Sun at?
Local Apparent Noon. Another viewpoint: I'm not sure there's enough information in this question to give a definite answer. Maybe I'm wrong.
What is the Doppler Shift as it applies to light?
That's more or less the same as the Doppler shift for other waves: a change of frequency, caused by relative movement between the source and the observer. When the distance is increasing the wavelength of the light increases. When the source of light and the observer are getting closer, the light's wavelength decreases. Red light has a longer wavelength than blue light.
How is light intensity like gravity?
The intensity of light from a point source measured by an observer and the magnitude of the forces of gravity between two masses are both inversely proportional to the square of the distance between them. And so is the magnitude of the forces between two electric charges or two electrically-charged objects.
What is the distance from the observer to the launch pad?
The distance is 500feet
What happens to the electric field when you get farther from an electric charge?
An electric field gets stronger the closer you get to a charge exerting that field. Distance and field strength are inversely proportional. When distance is increased, field strength decreases. The opposite is true as well. Additionally, field strength varies as the inverse square of the distance between the charge and the observer. Double the distance and you will find that there is 1/22 or 1/4th the electric field strength as there was at the start of your experiment.
What is the distance from point A in the ocean to the horizon?
2 miles.Answer:The distance to the horizon on the ocean is a function of the height of the observation point. In general (and with thanks to Pythagoras) it is:d=(h(D+h))0.5 whered = distance to the horizonD = diameter of the Earthh = height of the observer above sea level
What is path difference?
The path difference is the difference in the physical distance between the two sources to the observer, i.e., the difference in distance travelled from the source to the observer.
How is the size of an object affected by its distance from an observer?
Its size is not affected in the least by its distance from an observer. If it were, can you possibly imagine thestress and strain on Brett Favre's body during a game, as he is watched by 60,000 people in the stands, allat different distances from him ? ! ?The object's APPARENT size ... i.e. the angle that it subtends at the eye of the observer ... depends onthe observer's distance from it, in the following totally predictable and purely geometrical fashion:The angle subtended by the object =arctangent [ (object's dimension perpendicular to the line of sight) divided by (observer's distance) ].But that's the observer's fault, not the object's.
What is the angle of declination and how do you use it?
An angle of declination is relevant when an observer is at a higher altitude than the object being observed. It is the angle made by the line of sight with the horizontal. Suppose this is angle x. Then if the altitude of the observer is known to be h, then line-of-sight distance to the object is h*sin(x). The object is h*tan(x) from the point below the observer at the level of the object.Conversely, if the line-of-sight distance from the object to the observer or the horizontal distance to the point directly below the observer is known, it is possible to calculate the height of the observer.
How is pitch and volume affected by the speed or location of an object?
The volume (amplitude) of a signal emitted by an object, as measured by an observer, is inversely proportional to the distance of that object from said observer. Specifically, the volume is subject to the famous 'inverse-square' law, where the amplitude measured at a given distance from the source of the signal will decrease with the square of the distance of the observer from the source.For example, if the amplitude of a signal measured at 1 meter from an object is 8 units, then the amplitude measured at 2 meters (double the distance) will be 2 units (one quarter the amplitude).That is the core relationship between volume and the location of the source.Pitch (frequency) of a signal is affected by the speed of the object relative to the observer. If the source is travelling towards the observer, the pitch (frequency) will be higher than if the source were stationary. Similarly, if the object is travelling away from the observer, the pitch (frequency) will be lower that if the source were stationary. This is known as the Doppler Effect. An increased pitch due to the Doppler Effect is known as Blue Shift and the reduced pitch due to a receding source is known as Red Shift.One can calculate the observed frequency if the emitted frequency and the relative speeds of the source and observer are known as follows:f = ( (V+Vr)/(V+Vs) )F0Where:f is the observed frequencyF0 is the emitted frequencyV is the speed of the signal in the medium (speed of sound, light etc)Vr is the speed of the receiver in the medium (positive if moving towards the source)Vs is the speed of the observer in the medium (positive if moving away from the receiver)
Is a star's absolute magnitude dependent on its distance from the observer?
Absolute magnitude is based on an observer being at the same distance from any star.Apparent magnitude is based on the brightness of a star from Earth without any atmosphere.
A star's brightness is determined by the amount of light it gives off and its distance from?
The observer.
How bright does a star appear from earth?
It depends on its intrinsic brilliance and its distance from the observer
To take a clear picture of an image in a mirror should the camera be focused on the image or the mirror?
An image in a mirror is a "virtual" image which takes on certain characteristics. One of these characteristics is that the apparent distance is equal to the distance from the observer to the mirror plus the distance from the mirror to the subject. If the observer and subject are the same, then the apparent distance is twice that of the subject to the mirror. If the observer is 3 feet from the mirror and the subject is 20 feet away, the apparent distance is 23 feet. If you focus on the subject and have distance markings on your lens, you can prove this to yourself.
