The figure illustrates a number of optical lenses made of glass with index of refraction n. If
Question:
The figure illustrates a number of optical lenses made of glass with index of refraction n.
If used in eyeglasses, that type of lens would help for: (choose far sighted or near sighted)
a. W, for a .... person.
b. Y, for a .... person.
c. X, for a .... person.
How far from a concave mirror (radius 23.4 cm) must an object be placed if its image is to be at infinity?
3. The image of a distant tree is virtual and very small when viewed in a curved mirror. The image appears to be 14.1 cm behind the mirror. What is its radius of curvature? (Use positive for concave and negative for convex).
4. The figure illustrates a number of optical lenses made of glass with index of refraction n. An equation from which the focal length of each lens in air can be calculated is:
1/f = ( n-1 )( ± 1/r1 ± 1/r2 )
where r1 and r2 are the magnitudes of the radii of curvature of the lens surfaces.
Indicate the signs which are appropriate for the 1/r1 and 1/r2 terms in that equation:
a. For lens Z, the respective signs of 1/r1 and of 1/r2 are ....
b. For lens W, the respective signs of 1/r1 and of 1/r2 are ....
c. For lens Y, the respective signs of 1/r1 and of 1/r2 are ....
5. A dentist wants a small mirror that, when 2.12 cm from a tooth, will produce a 4.62x upright image. What is the mirror's radius of curvature?
6. The magnification of a convex mirror is +0.600x for objects 2.00 m from the mirror. What is the focal length of this mirror?
7. The refractive index of a transparent material can be determined by measuring the critical angle when the solid is in air. If θc= 41.7o, what is the index of refraction of the material?
Physics for Scientists and Engineers A Strategic Approach with Modern Physics
ISBN: 978-0133942651
4th edition
Authors: Randall D. Knight