LIght Question Preview (ID: 61651)
Physics Of Light.
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A light wave enters the Earth's atmosphere from a distant star. The wave carries
a) energy, only
b) matter, only
c) both energy and matter
d) neither energy or matter
What is the speed of light in lucite?
a) 4.53 x 10^-9 m/s
b) 2 x 10^8
c) 2.43 x 10^2
d) 1.24 x 10^8
The main factor determining the speed of an electromagnetic wave is
a) amplitude of the wave
b) phase of the wave
c) nature of the medium
d) distance traveled through the medium
A beam of light has a wavelength of 485 nanometers in air. What is the wavelength of this light in glycerol?
a) 150 nm
b) 393 nm
c) 589 nm
d) 330 nm
The angle of light reflection is always
a) bent when it enters the new medium
b) equal to the angle of reflection
c) 180 degrees from the incident ray
d) equal to the angle of incidence
An electromagnetic wave is produced by charged particles vibrating at a rate of 4.8 x 10^21 vibrations per second. The EM wave is classified as
a) a gamma ray
b) a radio wave
c) an infared wave
d) visible light
Light strikes a mirror at an angle of 40 degrees with the mirror. What would be the angle of reflection?
a) 40 degrees
b) 90 degrees
c) 50 degrees
d) 30 degrees
An x-ray photon and a radio photon are traveling in a vacuum. Compared to the wavelength and energy of the x-ray photon the radio photon has a
a) shorter wavelength and less energy
b) shorter wavelength and more energy
c) longer wavelength and less energy
d) longer wavelength and more energy
How are electromagnetic and mechanical waves similar?
a) both require a medium to travel
b) both can travel in a vacuum
c) both contain radio waves
d) both carry energy
An incident ray travels through medium x at an angle of 56 degrees with the normal line. It then travels into air and is refracted at an angle of 45 degrees. What is the absolute index of refraction for medium X?
a) .85
b) 1.47
c) 1.67
d) 1.00
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