NEET Electromagnetic Waves MCQs & PYQs

X-rays, $\gamma$ -rays, and heat rays (infrared) are part of the electromagnetic spectrum. $\beta$ -rays are streams of high-energy electrons or positrons, which are particles, not electromagnetic waves.

The greenhouse effect is primarily caused by greenhouse gases in the atmosphere absorbing and re-radiating infra-red rays (heat) back towards the Earth's surface, trapping the heat.