Chapter 11, Problem 59A

Interpretation Introduction

Interpretation: The speed at which the electromagnetic radiation moves through a vacuum is to be mentioned.

Concept introduction:Electromagnetic radiations consist of radio waves, microwaves, X-rays, gamma rays, visible light, etc. Vacuum is defined as something where there is no matter at all.

Answer to Problem 59A

EM waves travel through the vacuum with the speed of light.

Explanation of Solution

Electromagnetic radiations travel with different speeds on passing through a medium such as air, water and solid as they have different frequencies. But vacuum does not contain any medium. So, the electromagnetic radiations travel with the same speed called the speed of light equal to $3.0\times {10}^{8}m/s$ .

Conclusion

Electromagnetic radiations travel with the same speed called the speed of light.