When light passing through a prism undergoes dispersion, the effect is a due to:
a. different wavelengths traveling at different speeds.
b. different wavelengths refracting differently.
c. different wavelengths having different indices of refraction.
d. all of the above.
D
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If you hold two objects that have the same weight density, then they
A) may have unequal mass densities. B) have equal mass densities. C) are equal in weight.
Human reaction time is usually about 0.20 s. If your lab partner holds a ruler between your finger and thumb and releases it without warning, how far can you expect the ruler to fall before you catch it? The nearest value is:
a. 4.0 cm. c. 16 cm. b. 9.8 cm. d. 20 cm.
Suppose we wanted to represent all of these objects using the 1-to-10-billion scale from Chapter 1, on which the Sun is about the size of a grapefruit. Approximately how large in diameter would the star Aldebaran be on this scale?
A) 40 centimeters (the size of a typical beach ball) B) 6 meters (roughly the size of a dorm room) C) 15 meters (roughly the size of a typical house) D) 130 meters (slightly larger than a football field)
The proper abbreviation for ‘kilohertz' is ‘kHz.'
a. True b. False Indicate whether the statement is true or false