Question

What is the wavelength of a photon with a frequency of 4.72 x 1014 Hz?
A. 635 nm
B. 142 nm
C. 421 nm
D. 313 nm

Answer 1

Answer:

635 nm

Explanation:

more simple answer

Answer 2

The correct option is (a) 635 nm.

What is a simple definition of a wavelength?

• A wavelength  that is carried in space or down a wire has a wavelength, which is the separation between two identical places (adjacent crests) in the consecutive cycles.
• Wavelength is usually denoted by the Greek letter lambda (λ)

Given,

          λ=6.36×10−7 m

       Let  C = the speed of light =3.00× $10^{8}$ m/s

         Let  f = the frequency = 4.72 × $10^{14}$ Hz

         Let  λ=  the unknown wavelength

Now apply formula of wavelength

                      λ = C /f

               λ = $\frac{3.00 * 10^{8 }m/s }{4.72 * 10^{14} Hz}$

              λ = 6.36 × $10^{-7}$ m

                λ = 635 m

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