Multiple Choice
Small openings between leaves in a tree act as pinholes. The round spots of light cast on the ground below are images of
A) the Sun.
B) the openings themselves.
C) both of these
D) neither of these
Correct Answer:
Verified
Correct Answer:
Verified
Q7: Reflected light from the Moon in a
Q8: A rough surface for infrared waves may
Q9: When a colored light in air shines
Q10: Fermat's principle could be the principle of
Q11: If a fish in a pond looks
Q13: The critical angle is least in<br>A)glass.<br>B)water.<br>C)diamond.<br>D)vacuum.
Q14: Optical fibers are commonly used by<br>A)surgeons.<br>B)mechanics.<br>C)engineers.<br>D)aviators.<br>E)all of
Q15: Refraction causes the bottom of a swimming
Q16: Light travels fastest in<br>A)warm air.<br>B)cool air.<br>C)a vacuum.
Q17: Fermat's principle applies to<br>A)reflection.<br>B)refraction.<br>C)both of these<br>D)neither of