If lens produce a magnification of 4, the image is 4 times as large as the object and is inverted

1. If lens produce a magnification of 4, the image is 4 times as large as the object and is inverted. T/F

False

2. A virtual image will not show up on a screen and it cannot be photographed. T/F

False

3. Total internal reflection can occur only when light passes form a material of high refractive index to one of low refractive index, never the other way around. T/F

True

4. Light passes through 2 small parallel slits and leaves an interference pattern on a distant screen. If 2 slits are now moved closer to each other, the bright fringes on the screen will also move closer to each other. T/F

False

5. A double slit experiment is modified by placing a "half way plate" over the upper slit as shown in fig. 1. A half-wave plate has negligible thickness (much smaller than lambda) but has the intensity property that the output light wave amplitude is the input wave amplitude times -1(it has the effect of flipping the wave upside down) Green light passes through the double slit shown an falls on a distant screen, After inserting the half-wave plate, the previous central interference peak will become dark. T/F

True

6. Red and blue light pass through a double-slit and fall on a distant screen. The bright spots of red light will be farther from the center than the blue bright spots. T/F

True

7. Suppose you wanted to start a fire using sunlight and a mirror. Which of statements is accurate? Use concave, or convex mirror...

Best to use a concave mirror, with the object to be ignited pos. halfway between the mirror and its center of curvature.

8. AS you walk away from a plane mirror on a wall, your image is...

always the same size

9. A small piece of aluminum catomic #13 contains 10^15 atoms. If the piece of Al has a net charge of 3.0 mc what fraction of the electrons that the aluminum had when it was neutral would have had to be lost.

1.4*10^-3

10. It is impossible for any isolated object to have a charge of 3e. T/F

False