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Len [333]
3 years ago
10

A barcode scanner emits a red light with frequency of 4.62x1014 s –1 . What is the wavelength of this light in nm?

Physics
1 answer:
NemiM [27]3 years ago
4 0

Answer:

 λ = 649 nm

Explanation:

given,                                    

frequency,f = 4.62 x 10¹⁴ Hz

speed of light,c = 3 x 10⁸ m/s

we know,                                      

c  = f λ                                                          

\lambda=\dfrac{c}{f}                        

\lambda=\dfrac{3\times 10^8}{4.62\times 10^{14}}

 λ = 6.4935 x 10⁻⁷ m

 λ = 649 x 10⁻⁹ m

 λ = 649 nm

the wavelength of this light is equal to 649 nm

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