1. The speed of light in a piece of glass is measured to be 2.2 x 10⁸ m / s. What is the index of refraction for this glass?   Answer (32.0K)

2. The index of refraction for a particular wavelength of light in water of water is 1.33. What is the speed of light in water?   Answer (35.0K)

3. A beam of light makes an angle of 20^o with the normal to the surface of a plane mirror. What angle does the reflected beam make with the normal?   Answer (30.0K)

4. A beam of light traveling in air of index of refraction n₁ = 1.00 makes an angle of 8^o with the normal to a surface of a piece of glass of index of refraction 1.60. What is the angle of refraction of the beam that passes into the glass?   Answer (47.0K)

5. An object is located 25 cm in front of a plane mirror. How far is the image behind the mirror?   Answer (29.0K)

6. A lens has a focal length of 15 cm. An object is located 8 cm from the surface of the lens.

1. Calculate how far the image is from the lens.
2. Determine whether the image is real or virtual.
3. Calculate the magnification of the image (state whether the image is erect or inverted).   Answer (44.0K)

7. A lens has a focal length of -15 cm. An object is located 20 cm from the surface of the lens.

1. Calculate how far the image is from the lens.
2. Determine whether the image is real or virtual.
3. Calculate the magnification of the image (state whether the image is erect or inverted).   Answer (44.0K)

8. A positive lens has a focal length of 10 cm. An object is located 25 cm from the lens.

1. Calculate how far the image is from the lens.
2. Determine whether the image is real or virtual.
3. Calculate the magnification of the image (state whether the image is erect or inverted).   Answer (45.0K)

9. A negative lens has a focal length of - 10 cm. An object is located 20 cm from the lens.

1. Calculate how far the image is from the lens.
2. Determine whether the image is real or virtual.
3. Calculate the magnification of the image (state whether the image is erect or inverted).   Answer (44.0K)

10. A positive lens has a focal length of 10 cm. An object is located 20 cm from the lens.

1. Calculate how far the image is from the lens.
2. Determine whether the image is real or virtual.
3. Calculate the magnification of the image (state whether the image is erect or inverted).   Answer (44.0K)