Question

The speed of all electromagnetic waves is 3.00 × 108 meters per second. What is the wavelength of an X-ray with a frequency of 1.18 × 1018 Hz?

2.54 × 1026 meters
3.93 × 109 meters
2.54 × 10-10 meters
3.93 × 10-11 meters

Answer 1

the answer is......2.54x10^-10......

Answer 2

Explanation :

Given that,

The speed of all electromagnetic waves is,
`v=3* 10^8\ m/s`

Frequency of x-ray,
`\\u=1.18* 10^(18)\ Hz`

The speed of the wave is defined as the product of the frequency and the wavelength.

`\lambda=(v)/(\\u)`

`\lambda=(3* 10^8)/(1.18* 10^(18))`

`\lambda=2.54* 10^(-10)\ m`

So, the correct option is (c).

Hence, this is the required solution.