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Physics Ch. 27
Terms in this set (15)
what occurs when the outer electrons that buzz about the atomic nucleus encounter electromagnetic waves?
When electromagnetic waves encounter the electrons around an atom, the vibrations of the electromagnetic wave force the electrons to vibrate as well
What happens to light when it falls upon a material that has a natural frequency equal to the frequency of the light?
If light shines on an object that is above or below it's resonant frequency, the object reemits the light.
What is pigment?
Pigments are fine particles that selectively absorb the light of certain frequencies and selectively transmit others
What is the evidence for the statement that white light is a composite of all the colors of the spectrum?
White light is a composite of all colors of the spectrum and can be shown by passing sunlight through a prism and being able to see the rainbow colored spectrum of visible light.
To what color of light are our eyes most sensitive?
Our eyes are most sensitive to yellowgreen
What frequency ranges of the radiation curve do red, green, and blue occupy?
Red occupies the low frequency end of the visible spectrum. Green occupies the middle frequency part of the visible spectrum. Blue occupies the high frequency end of the visible spectrum.
What is the resulting color of equal intensities of red light and cyan light combined?
Red and cyan light combined form white light
When something is painted red, what color must be absorbed?
When something is painted red, it reflects red light and absorbs cyan light
If you look with a magnifying glass at a picture printed in full color in this or other books or magazines, you'll notice three colors of ink plus black, what are these colors?
The 3 other colors seen besides black in full color prints are cyan, magenta and yellow
Which interact more with high-frequency sounds--small bells or large bells?
Small particles interact more with higher frequency light
Why does the sky sometimes appear whitish?
The sky sometime appears whitish because there is a greater amount of larger particles in the atmosphere which scatter the other lower frequencies as well, forming white light
Why does the color of sunsets vary from day to day?
The color of sunsets varies from day to day based on the number of larger particles in the atmosphere.
What is the effect on the color of a could when it contains an abundance of large droplets?
When a cloud has an abundance of large droplets, the large drops absorb more light and make the cloud look dark.
What par tof the visible electromagnetic spectrum is most absorbed by water?
The red part of the electromagnetic spectrum is most absorbed by water
Why does water appear cyan?
When water absorbs the red part of the electromagnetic spectrum, the color reflected is cyan which makes the water appear cyan.
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