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

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

An Introduction to Physical Science

14th Edition

ISBN:9781305079137

Author:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar Torres

Publisher:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar Torres

Chapter6: Waves And Sound

Section: Chapter Questions

Problem 6MC: Which one of the following regions has frequencies slightly greater than the visible region in the...

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Concept explainers

Speed of light

The speed at which the light travels in a vacuum is unbiased for both the source and inertial frame of reference of the observer. This was postulated by the physicist, Albert Einstein, by observing the theory of electromagnetism of Maxwell. Also, there was no evidence for the luminiferous aether, that is, the medium for the propagation of light where the electromagnetic field exists.

Question

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

Definition Definition Rate at which light travels, measured in a vacuum. The speed of light is a universal physical constant used in many areas of physics, most commonly denoted by the letter c . The value of the speed of light c = 299,792,458 m/s, but for most of the calculations, the value of the speed of light is approximated as c = 3 x 10 8 m/s.

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