Chapter 26: Properties Of Light
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- 1.Most of the waves in the electromagnetic spectrum are
- A.
Red light.
- B.
Blue light.
- C.
Green light.
- D.
Invisible.
- 2.Electromagnetic waves consist of
- A.
Compressions and rarefactions of electromagnetic pulses.
- B.
Oscillating electric and magnetic fields.
- C.
Particles of light energy.
- D.
High-frequency gravitational waves.
- 3.The fact that light travels at 300,000 km/s is a consequence of
- A.
Electromagnetic wave propagation.
- B.
Electromagnetic field induction.
- C.
Maxwell's laws.
- D.
Energy conservation.
- E.
None of these
- 4.The source of all electromagnetic waves is
- A.
Changes in atomic energy levels.
- B.
Vibrating atoms.
- C.
Accelerating electric charges.
- D.
Crystalline fluctuations.
- E.
None of these
- 5.The main difference between a radio wave and a light wave is its
- A.
Speed.
- B.
Wavelength.
- C.
Frequency.
- D.
All of these
- E.
Two of these
- 6.Which of these electromagnetic waves has the shortest wavelength?
- A.
Radio waves
- B.
Infrared waves
- C.
X-rays
- D.
Ultraviolet waves
- E.
Light waves
- 7.Compared to ultraviolet waves, the wavelength of infrared waves is
- A.
Shorter.
- B.
Longer.
- C.
The same.
- 8.Compared to radio waves, the velocity of visible light waves in a vacuum is
- A.
Less.
- B.
More.
- C.
The same.
- 9.If an electric charge is shaken up and down
- A.
Sound is emitted.
- B.
Light is emitted.
- C.
Electron excitation occurs.
- D.
A magnetic field is created
- E.
Its mass decreases.
- 10.If an electron vibrates up and down 1000 times each second, it generates an electromagnetic wave having a
- A.
Period of 1000 s.
- B.
Speed of 1000 m/s.
- C.
Wavelength of 1000 m.
- D.
Frequency of 1000 Hz.
- E.
Wavelength of 1000 km.
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