Practice Test

Question 1

What is the study of the spectra produced from the emission and absorption of electromagnetic radiation?

Revolt · Accepted Answer

A: spectroscopy

Question 2

When light from one source, X, strikes a metal, electrons are ejected. When light from another source, Y, strikes the same metal, electrons are not ejected. Which best explains why this occurs?

Revolt · Accepted Answer

B: Photons of light from source X carry more energy than photons of light from source Y.

Question 3

Which idea did Isaac Newton’s experiments with light support?

Revolt · Accepted Answer

B: Light is made of particles because it travels only in a straight path.

Question 4

How should Simon use the theory of relativity to describe what the astronaut must do in order to hit the button?

Revolt · Accepted Answer

B: The astronaut should toss the penny horizontally straight behind her as it will appear to fall in an arc because objects in an accelerating frame of reference behave in the same way as they would in a gravity field.

Question 5

Which spacecraft appears the longest to an outside observer?

Revolt · Accepted Answer

C: Y

Question 6

Which labels belong in the areas marked X, Y, and Z?

Revolt · Accepted Answer

C: X: laws of physics are the same for all uniformly moving frames of motion  Y: applies to objects with constant velocity  Z: speed of light through empty space is the same for all observers

Practice Test Answers

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