Consider the following:
1. X-rays
2. Infra-red rays
3. Radio waves
4. Gamma rays
5. Microwaves
Which among the following is the correct order of their increasing wavelength?

Answer: [B] 4, 1, 2, 5, 3

4, 1, 2, 5, 3 (Gamma rays, X-rays, infra-red rays, microwaves, radiowaves)

Gamma rays : shorter than 0.1 Å

X-rays : 0.1 Å to 100 Å

Ultra-violet rays : 100 Å to 4000 Å

Visible light : 4000 Å to 8000 Å

Infrared radiation : 8000 Å to 3 × 107 Å

Microwaves : 3 × 107 Å to 1011 Å

Radiowaves : 11 × 1011 Å and above

This question is a part of GKToday's Integrated IAS General Studies Module