Question

1) in order to create a virtual image with a concave mirror, where must an object be placed?

a) at the focus

b) between the focus and mirror

c) beyond the center of curvature

d) between the focus and the center of curvature

2) Car headlights use spherical concave mirrors. to produce a parallel beam of reflected light, where must the bulb of a headlight be placed?

a) beyond the center of curvature

b) at the center of curvature

c) at the focus

d) between the focus and the mirror

3) Yellow sodium light has a wavelength of 589 nanometers in a vacuum. what is the speed of the yellow sodium light when it travels through glass (n=1.5)?

a) 9x10^-7 m/s

b) 4x10^-7 m/s

c) 2x10^8 m/s

d) 3x10^8 m/s

e) 4x10^8 m/s

4) Mr. Jackson places a 6 cm object from a converging lens (focal length =9 cm) what is the magnitude of the magnification of the image produced?

a) 4

b) 1.5

c) 0.6

d) 3

e) 2

5) The following phenomenon may cause a concave mirror to form an image that is out of focus:

a) dispersion

b) refraction

c) spherical aberration

d) chromatic aberration

Answer 1