Question

A certain type of laser emits light that has a frequency of 4.6 x 1014 Hz. The light, however, occurs as a series of short pulses, each lasting for a time of 3.1 x 10-11s. The light enters a pool of water. The frequency of the light remains the same, but the speed of light slows down to 2.3 x 108 m/s. In the water, how many wavelengths are in one pulse

Answer 1

14,260

Step-by-step explanation:

Relevant data provided for computing the wavelengths are in one pulse is here below:-

The number of wavelengths in Ls =
`4.6* 10_1_4`

Therefore the Number of in time = Δt =
`3.1* 10_-_1_1`

The number of wavelengths are in one pulse is shown below:-

`Number\ of\ wavelengths = \triangle t* f`

`= 3.1* 10_-_1_1* 4.6* 10_1_4`

= 14,260

Therefore for computing the number of wavelengths are in one pulse we simply applied the above formula.