Question

Q. With reference to the Electromagnetic spectrum, which of the following statements is/are correct?

Select the correct answer using the codes given below:

• A.
  1 only
• B.
  2 only
• C.
  Both 1 and 2
• D.
  Neither 1 nor 2

Answer 1

The correct option is D

Neither 1 nor 2

Explanation:

Statement 1 is incorrect:

• Radio Waves are used primarily for communications including voice, data and entertainment media.
• Microwaves are used for high-bandwidth communications, radar and as a heat source for microwave ovens and industrial applications.

Statement 2 is incorrect: Radio waves are at the lowest range of the EM spectrum, with frequencies of up to about 30 billion hertz, or 30 gigahertz (GHz), and wavelengths greater than about 10 millimeters (0.4 inches).