Dispersion occurs when:
a. some materials bend light more than other materials.
b. a material slows down some wavelengths more than others.
c. a material changes some frequencies more than others.
d. light has different speeds in different materials.
b
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A Doppler effect occurs when a source of sound moves
A) towards you. B) away from you. C) either of these D) neither of these
The transition from chemistry to biology occurred
A) gradually in a number of distinct steps B) very quickly in in one single step C) very quickly in a number of distinct steps D) gradually in one single step
Two simple pendulums, A and B, are each 3.0 m long, and the period of pendulum A is T. Pendulum A is twice as heavy as pendulum B. What is the period of pendulum B?
A) 2T B) T/2 C) T/ D) T E) T
When you look into a pool of water, the depth looks less than it actually is because of __________
Fill in the blank(s) with correct word