Can someone help me pls I'm confused

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The speed of a light wave c is related to its wavelength λ and its frequency f by C=λf. If the speed of light is 3 × 10^8 meters/second and the wavelength of an infrared wave used in a remote control is 7 × 10^-9 meters, then what us it's frequency A) 2 ×...
3 years ago

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The following answers were posted by visitors named Can someone help me pls I'm confused.