Question

1. A certain electromagnetic wave is 5 nanometers (5.0x10-*9) long.(a) what is its frequency?(b) what type of electromagnetic radiation is this?2. The ultraviolet rays that cause sun burn are called UV-B rays. They have a wavelength of approximately 300 nanometers 3.0x10^(-7) m, what is its frequency?3. Infrared rays from the sun are wat make our skin feel warm on sunny day. If an infrared ray has a frequency of 3,0x10*12 HZ, what is it wavelength?4. Electromagnetic waves wit the highest amount of energy are called gamma rays. Gamma rays have wavelengths of less thank 10-trillionths of a meter (1.9=0x10*-11m).(a) Determine the frequency that corresponds with the wavelength.(b) Is this the minimum or maximum frequency of a gamma ray?(c) How much energy does this gamma ray have?

Answer 1

Given that the wavelength is

`\lambda=\text{ 3}*10^{-7\text{ }}m`

The speed of rays is

`c=\text{ 3}*10^8\text{ m/s}`

We have to find the frequency.

The formula to calculate frequency is

`f=(c)/(\lambda)`

Substituting the values, the frequency will be

`\begin{gathered} f=(3*10^8)/(3*10^(-7)) \\ =10^(15)\text{ Hz} \end{gathered}`