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A red laser pointer has a wavelength of 6.5 x 10-7 meters. What is the frequency for this light? What is the energy per photon for this light? g

Answer :

Answer:

Explanation:

wavelength, λ = 6.5 x 10^-7 m

velocity of light, c = 3 x 10^8 m/s

Let the frequency is f

Use the formula

c = f x λ

3 x 10^8 = f x 6.5 x 10^-7

f = 4.6 x 10^14 Hz

Energy of each photon, E = h x f

where, h is the Plank's constant

E = 6.63 x 10^-34 x 4.6 x 10^14

E = 3.06 x 10^-19 J

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