Question

1. Light reflects from the front and back surfaces of a bubble. Assume the bubble is made primarily of water (index of refraction = 1.33). If the bubble has a thickness of 546 nm, what wavelength of light will undergo destructive interference (the bubble will appear dark)?

a) 581 nm b) 726 nm c) 410 nm d) 2905 nm e) 968 nm f) 546 nm

2. You shine white light on a piece of paper covered by ink that absorbs only blue light. What will be the color of the light reflected from the paper?

3.An object is 20 cm in front of a diverging lens with a focal length of -6 cm. Calculate the image distance and the magnification. Is the image real or virtual? Upright or inverted? Magnified or minified?

Answer 1