Question

What is the wavelength of a light wave with a frequency of 2.5 × 1014 Hz? A. 7.5 × 10-6 m B. 1.2 × 10-6 m C. 1.2 × 10-5 m D. 8.3 × 105 m

Answer 1

The right option is B

Step-by-step explanation:

The frequency of the wave is given by the following formula:

`f = (c)/(\lambda)`

where,

f = frequency of the wave.

c = speed of the light.

λ = wavelength of the light.

`\lambda =  (c)/(f)`

`\lambda = (3*10^(8))/(2.5*10^(14))`

`\lambda  = 1.2 * 10^(-6)`

Therefore the correct option is B.