Question

In glass, light travels with a speed of 2.0 × 10^8 m/s. Light with a frequency of 3.6 × 10^14 Hz moves through the glass. What is the wavelength of the light?

A. 1.8 × 10^6 m
B. 7.2 × 10^22 m
C. 1.4 × 10^-23 m
D. 5.6 × 10^-7 m

Answer 1

wavelength= speed/ frequency
w= 2.0 × 10^8 m/s/ 3.6 × 10^14 Hz
w=5.6 × 10^-7 m
The answer is D. 5.6 × 10^-7 m

Answer 2

The wavelength of the light can be calculated by dividing the speed of light by its frequency. Since both the speed of light and the frequency are given, we simply just need to perform a simple calculation.


`wavelength= (speed)/(frequency)= (2.0* 10^(8) )/(3.6*10^(14))=5.6*10^(-7)`

ANSWER: D.
`5.6*10^(-7)`