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The arrows a) and b) -identified in the illustration- indicate the ...
A crest
B rest position
C amplitude
D wavelength
As frequency increases, this will happen to the wavelength ...
A they get longer and less frequent
B they get longer and more frequent
C they get shorter and less frequent
D they get shorter and more frequent
White light is refracted through a device that breaks it into all the visible colors that make up white light. This device is called...
A refractor dish
B refractor lens
C prism
D light source
All the colors ROYGBIV of the visible
spectrum have different wavelengths. The color with the shortest wavelength is...
A violet
B blue
C yellow
D red
Rainbows are formed because of the refraction of white light in the sky. The two things necessary for a
rainbow to form are ...
A clouds and raindrops
B sunlight and raindrops
C clouds and sunlight
D sunlight and low temperatures
The invisible spectrum has wavelengths that cover a very large range of electromagnetic radiation.
This type of electromagnetic energy can burn your skin, even though most of it is absorbed by ozone in
the Earth’s atmosphere. Is it...
A infrared
B microwave
C ultraviolet
D x-ray
The only type of radiation which can penetrate solid material and concrete walls is ...
A microwaves
B x-rays
C infrared waves
D gamma rays
Radar is an acronym for radio detection and ranging. These devices send out waves, which bounce
off objects and return (obeying the law of reflection). Older radar devices use radio waves, whereas modern radar devices use...
A microwaves
B ultraviolet waves
C infrared waves
D gamma rays
Ultraviolet light can kill living cells in humans. If babies are born with a liver condition, which makes
their skin yellow, they are placed under ultraviolet light to treat it. The skin condition is known as ...
A scurvy
B eczema
C jaundice
D atrophy
Doctors useMRI (magnetic resonance imaging) machines to create pictures of the tissues inside the human body. The MRI machine uses these types of electromagnetic waves to produce images ...
A microwaves
B radio waves
C infrared waves
D X-Rays
Thomas Edison was the first to design light bulbs in the late 1800’s. They didn’t last very long because he used this as the filament ...
A bamboo
B tungsten
C paper clip
D human hair
A fluorescent light bulb is a glass tube filled with a small amount of gas, such as mercury vapor. The inside of the tube is coated with a white powder called ...
A fluophor
B phosphor
C mercuicor
D incandescent
Phosphorescence is slightly different from fluorescence. In phosphorescence, the energy that is used to produce the light is absorbed by the material and then given off later. These types of materials ...
A glow in the dark
B become natural light
C last longer than fluorescent light
D produce light and give off lots of heat
Incandescent light bulbs produce 95% heat and only 5% visible light. Fluorescent light bulbs are much
more efficient, because they produce 80% heat and ...
A 2 times as much light
B 3 times as much light
C 4 times as much light
D 5 times as much light
When living organisms produce their own light it is called bioluminescence. The firefly produces its own light by using a light-producing organ on the underside of its body called a...
A phosphurtube
B phosporescent
C phototube
D photophore
The primary colors of "light" are:
A red, yellow & blue
B red, green & yellow
C red, yellow & green
D red, green & blue
The "secondary" colors of light are:
A cyan, green & yellow
B cyan, magenta & orange
C magenta, yellow & cyan
D magenta, green & yellow
In older television sets, the theory of color is put into practice. If you look closely at the screen, you will
