Chapter 26: Properties of Light Flashcards
Most of the waves in the electromagnetic spectrum are: a) gamma rays; b) infrared light; c) green light; d) not visible to the human eye; e) microwaves.
d) not visible to the human eye.
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.
d) energy conservation.
Which of these electromagnetic waves has the shortest wavelength: a) radio waves; b) infrared waves; c) X-rays; d) ultraviolet waves; e) light waves.
c) X-rays.
Which of the following is fundamentally different from the others: a) sound waves; b) X-rays; c) gamma rays; d) light waves; e) radio waves.
a) sound waves.
Infrared waves are often called heat waves because they: a) emanate from relatively hot sources; b) consist of frequencies lower than those of visible light; c) induce resonance in molecules and increase internal energy in a substance; d) are absorbed rather than reflected by the skin; e) infrared is hard to pronounce.
c) induce resonance in molecules and increase internal energy in a substance.
Visible light radiation travels fastest in: a) air; b) vacuum; c) water; d) glass; e) diamond.
b) vacuum.
Color vision and detail are perceived with: a) the rods; b) the cones; c) the macula; d) the cornea; e) the pupilometric.
b) the cones.
Which of the following electromagnetic waves have the highest frequency: a) microwaves; b) X-rays; c) infrared; d) visible light; e) gamma rays.
e) gamma rays.
Glass is transparent to
all visible light.
The atmosphere is transparent to
visible light, some ultraviolet light, and some infrared light.
A solar eclipse occurs when the: a) sun passes into Earth’s shadow; b) moon passes into the Earth’s shadow; c) the moon’s shadow touches Earth.
c) the moon’s shadow touches Earth.
The cones in the retina of the eye are: a) most densely packed at the center of vision; b) uniformly spread along the visual field; c) concentrated along the periphery of vision.
a) most densely packed at the center of vision.
The moon would be at its fullest just before the time of a: a) solar eclipse; b) lunar eclipse; c) both of these; d) none of these.
b) lunar eclipse
Compared to ultraviolet waves, the wavelength of infrared waves is: a) shorter. b) longer; c) the same.
b) longer.
Materials generally become warmer when light is: a) absorbed by them; b) reflected by them; c) transmitted by them; d) all of these; e) none of these.
a) absorbed by them.
The main difference between a radio wave and a sound wave is their different: a) frequencies; b) wavelengths; c) energies; d) amplitudes; e) modes of travel.
e) modes of travel.
Which of the following cannot travel in a vacuum: a) a light wave; b) a sound wave; c) a radio wave; d) All can travel in a vacuum; e) None can travel in a vacuum.
b) a sound wave.
The Earth’s atmosphere is transparent to most waves in the: a) infrared part of the spectrum; b) visible part of the spectrum; c) ultraviolet part of the spectrum; d) entire electromagnetic spectrum.
b) visible part of the spectrum.
The speed of light in the void between molecules in glass is: a) more than its speed in a vacuum; b) the same as its speed in a vacuum; c) less than its speed in a vacuum.
b) the same as its speed in a vacuum.
While Earth is experiencing a total solar eclipse, an observer on the side of the moon facing the Earth would see: a) Earth disappear from the sky; b) Earth dim and turn reddish; c) nothing unusual; d) a tiny dark spot move across the face of Earth.
d) a tiny dark spot move across the face of Earth.
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.
e) two of these.
What are the two main differences?
When ultraviolet light is incident upon glass, atoms in the glass: a) are forced into vibration; b) resonate; c) pass the light energy along practically undiminished; d) freely absorb and re-emit most of the ultraviolet light.
b) resonate.
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.
b) oscillating electric and magnetic fields.
If the sun were to disappear right now, we wouldn’t know about it for 8 minutes because it takes 8 minutes: a) for the sun to disappear; b) to operate receiving equipment in the dark; c) for light to travel from the sun to the Earth; d) none of these .
c) for light to travel from the sun to the Earth.
