Question

Which one of the following correctly represents the change in wave characteristics (all in vacuum) from microwaves to X-rays in electromagnetic spectrum?

• A. Speed remains same, Wavelength decreases, Frequency remains same
• B. Speed remains same, Wavelength decreases, Frequency increases
• C. Speed increases, Wavelength increases, Frequency decreases
• D. Speed remains same, Wavelength increases, Frequency remains same

Hint:

In the electromagnetic spectrum, the speed of light is constant in a vacuum, but the wavelength and frequency are inversely related. As wavelength decreases, frequency increases.

Answer 1

The Correct Option is B

In the electromagnetic spectrum, all waves travel at the same speed in a vacuum, which is the speed of light \( c = 3 \times 10^8 \, \text{m/s} \). - Microwaves have longer wavelengths than X-rays. - As we move from microwaves to X-rays, the wavelength decreases and the frequency increases. Thus, the correct answer is (B): Speed remains same, Wavelength decreases, Frequency increases.