1. Find the index of refraction of a medium for which the angle of incidence of a light beam is 31.5° and angle of refraction is 25.6°.
2. If the index of refraction of a medium is 2.40 and the angle of incidence is 14.6°, what is the angle of refraction?
3. If the index of refraction of a liquid is 1.50, find the speed of light in that liquid.
4. The angle of incidence of light passing from air to a liquid is 38.0°. The angle of refraction is 24.5°. What is the index of refraction of the liquid?
5. If the critical angle of a liquid is 42.4°, find the index of refraction for that liquid.
6. If the index of refraction of a substance is 2.45, find its critical angle of incidence.
7. A converging lens has a focal length of 15.0 cm. If it is placed 48.0 cm from an object, how far from the lens will the image be formed?
8. An object 2.50 cm tall is placed 20.0 cm from a converging lens. A real image is formed 9.00 cm from the lens.
(a) What is the focal length of the lens?
(b) What is the size of the image?
9. The focal length of a lens is 5.00 cm. How far from the lens, must the object be to produce an image 1.50 cm from the lens?
10. If the distance from the lens in your eye to the retina is 19.0 mm, what is the focal length of the lens when reading a sign 40.0 cm from the lens?