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o-na [289]
3 years ago
13

A beam of light has a wavelength of 4.5 x10^-7 meter in a vacuum. the frequency of this light is

Physics
1 answer:
valkas [14]3 years ago
3 0
The basic relationship between frequency and wavelength for light (which is an electromagnetic wave) is
c= f \lambda
where c is the speed of light, f the frequency and \lambda the wavelength of the wave. 
Using \lambda=4.5 \cdot 10^{-7} m and c=3 \cdot 10^8 m/s, we can find the value of the frequency:
f= \frac{c}{\lambda}= \frac{3 \cdot 10^8 m/s}{4.5 \cdot 10^{-7} m}=6.7 \cdot 10^{14} Hz
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