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radius of curvature is double of focal length.
therefore, the formula is:
1/f = (n-1)[ 1/R1 - 1/R2 + (n-1)d/nR1R2]
here f= focal length
n=refractive index
R1=radius of curvature of first surface
R2=radius of curvature of 2nd surface
d=thickness of the lens
using this, if you know rest all except one, then you can calculate that.
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∙ 14y ago
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What has two lenses called the eyepiece lens and objective lens?
Maybe its "ocular".
Concave and convex glasses?
Glasses may have convex or concave lenses, depending on the needs of the wearer. A lense for correcting myopia (near-sightedness) is concave, being thinner in the middle than at the edges. A lense correcting hyperopia (farsightedness) is convex, buldging in the middle and becoming thinner toward the edges.
What happens to most of the light rays that strike the convex lens?
The, light rays reflect depending on the curature of the concave.
What is the function of the lens?
The lens in our eye is 10x and it's a concave lens. When the light goes through it, the light bends.
Explain the function of the lens in the eye?
The function of the lens of our eyes:To reflect the light and then you see that the black and white sclera protecs the iris with the cornea and with the macula on the helping optic nerve.
How lens power change with curvature of lens surface?
The lens power increases as the curvature of the lens surface becomes steeper. A lens with a larger radius of curvature will have a lower power, while a lens with a smaller radius of curvature will have a higher power. This relationship is described by the lensmaker's equation, which relates the power of a lens to the refractive index of the lens material and the radii of curvature of its surfaces.
What is radius of curvature?
The radius of the sphere of which a lens surface or curved mirror forms a part is called the radius of curvature.
Can focal length and radius of curvature of a lens be same?
NO it cannot be. Because radius of curvature is given by the expression R = 2 f
Formula of radius of curvature of double convex lens?
Radius of curvture = twice the focal length of the double convex lens In symbols R = 2*f or f = R/2 Hope u seek the same
The focal point of a lens depends on which two things?
Radius of curvature and refractive index of the material
How do you use the lensometer or lens clock for finding the refractive index of a lens?
The formula for calculating a lens' refractive power is as follows:n = (D * R) + 1, where n = refractive power, D = optical power in diopter, and R = lens curvature radius.A lens clock will give you an estimated optical power, d and from there you can work out the curvature radius by using the formula:R = (0.53)/d.A lensometer will give you the actual optical power, D.Input the R and D into the first formula and you will get the lens' refractive index, n.
Why should you use a convex lens of large radius of curvature in performing newtons ring experiment?
Radius of rings is directly proportional to the square root of the radius of curvature. Thin lens would have larger radius of curvature and hence the option
How are concave and convex lens alike?
They are both made of a transparent medium with a refractive index > 1.Both have one or two sides possessing a curvature which, combined with their refractive properties, causes light rays to be deflected(convex ()> ) or (concave )(< )
A lens that curves outward is called?
)( is a concave lens() is a convex lens
What is a concave lens?
A lens that is thinner in the middle and thicker at the edges is called a concave lens.
What is another name for concave lens?
A concave lens is otherwise known as a diverging lens.
Which lens concave or convex forms the image wider?
Only a convex lens forms any kind of real image and the size of the image is dependent upon the focal length (hence the curvature and and substance) of the lens. A concave lens forms a virtual or imaginary image in front of the lens. It is one that cannot be projected onto a surface. Perhaps what you mean has to do with convergence and divergence. A convex lens causes light rays to converge (come together at a point), while a concave lens causes rays to diverge.
