Observe the following radiations:
IR rays, sound waves, Radio waves and X-rays. Find which is not electromagnetic.

Which of the following is not an electromagnetic wave?

Which of the following is not true for cathode rays?

Which of the following waves can be polarized (i) X-rays (ii) sound waves. Why?

Classify the following into alpha, beta and gama It is an electromagnetic wave

A certain radio station broadcasts on a frequency of 980 KHz. Calculate the wave length of the electromagnetic radiation emitted by the transmitter. Which part of the electromagnetic spectrum does it belong to?

Arrange the following type of radiations in increasing order of frequency: (a) radiation from microwave oven, (b) amber light from traffic signal, (c) radiation from FM radio, (d) cosmic rays from outer space and (e) X-rays.