If the speed of light is 3×108 meters/second and the wavelength of an infrared wave used in a remote control is 7×10−9 m

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answerhappygod
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If the speed of light is 3×108 meters/second and the wavelength of an infrared wave used in a remote control is 7×10−9 m

Post by answerhappygod »

If the speed of light
is 3×108 meters/second and the wavelength of
an infrared wave used in a remote control
is 7×10−9 meters, then what is its frequency?
A. 4×1016 Hz
B. 4×10−2 Hz
C. 2×100 Hz
D. 2×10−17 Hz
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