Question

What is the frequency of an xray with a wavelength of 2x10-10m?

a) 1.5x1018hz
b) 6.67x10-19hz
c) 3x108hz
d) 1.5hz

Show calculation

Answer 1

1.5 x 10¹⁸hz

Step-by-step explanation:

Given parameters:

Wavelength = 2 x 10⁻¹⁰m

Unknown:

Frequency = ?

Solution:

To find the frequency, use the expression below;

V = f x wavelength

V is the speed of light = 3 x 10⁸m/s

f is the frequency

Now;

Insert the parameters

3 x 10⁸ = 2 x 10⁻¹⁰ x frequency

Wavelength =
`(3 x 10^(8) )/(2 x 10^(-10) )` = 1.5 x 10¹⁸hz