Quiz
Ch 26
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Perguntas do quiz (22)
1Most of the waves in the electromagnetic spectrum are
- Ainvisible.
- Bred light.
- Cgreen light.
- Dblue light.
2Electromagnetic waves consist of
- Aparticles of light energy.
- Bcompressions and rarefactions of electromagnetic pulses.
- Chigh-frequency sound waves.
- Doscillating electric and magnetic fields.
3The source of all electromagnetic waves is
- Aaccelerating electric charges.
- Bvibrating atoms and molecules.
- Ccrystalline fluctuations.
- Dchanges in atomic energy levels.
- Enone of the above
4In free space, electromagnetic waves travel at a
- Asingle speed.
- Bvariety of speeds.
- Cspeed depending on frequency.
5Radio waves travel
- Ain common cases at the same speed as sound waves.
- Bat a speed that depends on frequency.
- Cslower, on average, than sound waves.
- Dalways much faster than sound waves.
6 If a light signal and a radio signal were emitted simultaneously from a distant star, the first to reach Earth would be the
- Aradio signal.
- Blight signal.
- Cboth the same time
7If the Sun were to disappear at this moment, we wouldn't know about it for
- A7 seconds, reflex time.
- B8 minutes.
- C8 seconds.
- D8 hours.
8Which of these electromagnetic waves have the shortest wavelength?
- Alight waves
- Bultraviolet waves
- Cradio waves
- Dinfrared waves
- EX-rays
9Compared to radio waves, the velocity of visible light waves in a vacuum is
- Amore.
- Bless.
- Cthe same.
10Sunburns are produced by
- Aultraviolet light.
- Binfrared light.
- Cvisible light.
- Dall of the above
- Enone of the above
11Which best shields you from sunburn when at the beach?
- Afrequent turning of your body
- Ba sheet of glass between you and the Sun
- Ca cloudy day
- Dall of the above
- Enone of the above
12The fact that you can see stars in the nighttime sky is evidence that
- Aour atmosphere is transparent to visible light.
- Blight can travel in a vacuum.
- Cboth of these
- Dneither of these
13Which of the following cannot travel in a vacuum?
- Aa sound wave
- Ba light wave
- Ca radio wave
- Dall can
- Enone can
14 If an electron vibrates up and down 1000 times each second, it generates an electromagnetic wave having a
- Awavelength of 1000 m.
- Bwavelength of 1000 km.
- Cspeed of 1000 m/s.
- Dperiod of 1000 s.
- Efrequency of 1000 Hz.
15Compared to its average speed in air, the average speed of a beam of light in glass is
- Aless.
- Bthe same.
- Cmore.
16Materials generally become warmer when light is
- Aabsorbed by them.
- Btransmitted by them.
- Creflected by them.
- Dall of the above
- Enone of the above
17A pair of sunglasses and a pair of clear reading glasses are left in the sunlight. The hotter glasses will be the
- Asunglasses.
- Breading glasses.
- Cboth of these
- Dneither of these
18A lunar eclipse occurs when the
- AMoon passes into Earth's shadow.
- BSun passes into Earth's shadow.
- CEarth passes into the Moon's shadow.
- DEarth passes into the Sun's shadow.
19While Earth is experiencing a total solar eclipse, an observer on the side of the Moon facing Earth would see
- AEarth dim and turn reddish.
- BEarth disappear from the sky.
- Cnothing unusual.
- Da dark area moving across the face of Earth.
20When an astronaut on the Moon experiences a solar eclipse, observers on Earth see
- Aa solar eclipse.
- Bno eclipse at all.
- Ca lunar eclipse.
21In the periphery of our vision, we are
- Amore sensitive to low frequencies than high ones.
- Bsensitive to both movement and color.
- Cinsensitive to color and movement.
- Dnone of the above
- Esensitive to movement, but cannot see color.
22The main difference between the retina of a human eye and that of a dog's eye is the
- Apredominance of cones in a dog's retina.
- Babsence of cones in a dog's retina.
- Csmall number of cones in a human's eye.
- Dmore intricate optic nerve in a human's eye.
- Enone of the above
Informações
- Descrição
- IDK Physics (PHYS 101 Practice Tests) Quiz sobre Ch 26, criado por Winston Schultz em 16-12-2015.
- Autor
- Winston Schultz
- Idioma
- English
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- 0
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