Question

a ray of yellow light ( f = 5.09 × 1014 hz) travels at a speed of 2.04 × 108 meters per second in

Answer 1

Velocity = fλ

where f is frequency in Hz, and λ is wavelength in meters.

2.04 * 10⁸ m/s =  5.09 * 10¹⁴  Hz   *  λ 

(2.04 * 10⁸ m/s) / (5.09 * 10¹⁴  Hz ) = λ 

4.007*10⁻⁷  m =  λ 

The wavelength of the yellow light = 4.007*10⁻⁷  m