1. If you hold two fingers very close together and look at a bright light, you see lines between the fingers. What is happening?
(a) You are holding your fingers too close to your eye to be able to focus on it.
(b) You are seeing a diffraction pattern.
(c) This is a quantum-mechanical tunneling effect.
(d) The brightness of the light is overwhelming your eye.
2. Light passes through a slit that is about 5 x 10-3 m high and 5 x 10-7 m wide. The central bright light visible on a distant screen will be
(a) About 5 x 10-3m high and about 5 x 10-7m wide.
(b) About 5 x 10-3m high and wider than 5 x 10-7m
(c) About 5 x 10-3m high and narrower than 5 x 10-7m
(d) Taller 5 x 10-3m than high and wider than 5 x 10-7m
(e) Taller 5 x 10-3m than high and about 5 x 10-7m wide.