Question

What is the wavelength of a light ray that has a frequency of 7.4 E12 Hz?

Answer 1

The wavelength of the light ray with the given frequency is 4.05 × 10⁴nm.

Given the data in the question;

• Frequency of the light ray; $f = 7.4 * 10^{12}Hz$

• Wavelength; $\lambda = \ ?$

Wavelength

Wavelength can be simply defined as the spatial period of a periodic wave. When the shapes of waves are repeated, the distance over which they are repeated is called wavelength. Wavelength is expressed as;

$\lambda = \frac{c}{f}$

Where $\lambda$ is wavelength, f is frequency and c is speed of light( $c = 3*10^8m/s$ )

We substitute our values into the expression above to determine the wavelength of the light ray.

$\lambda = \frac{c}{f} \\\\\lambda = \frac{3*10^8m/s}{7.4*10^{12}s^{-1}}} \\\\\lambda = \frac{3*10^8ms/s}{7.4*10^{12}}}\\\\\lambda = 4.05*10^{-5}m\\\\\lambda = 4.05*10^{4}nm$

Therefore, the wavelength of the light ray with the given frequency is 4.05 × 10⁴nm.

Learn more about wavelength: brainly.com/question/16776907