Question

JEE MAINS PHYSICS QUESTION SEPTEMBER 2020 The correct order of wavelength will be?

Answer 1

correct order of wavelength will be :

1. Radio waves > micro waves > visible rays > X rays
2. Micro waves > radio waves > visible rays > X - rays
3. X - rays > Radio waves > microwaves > visible rays
4. X - rays > radio waves > visible rays > microwaves

solution : this question is based on experimental data. so you should memorize order of wavelength of different waves.

I memorized it by word “RMIVUXγC”

where R ⇒Radio waves

M ⇒Microwaves

I⇒infrared waves

V⇒Visible rays

U⇒Ultraviolet waves

X ⇒X - rays

γ⇒gamma rays

C ⇒cosmic rays

order of wavelength is R > M > I > V > U > X > γ > C

so, correct order of wavelengths is ...

Radio waves > microwaves > visible rays > X - rays

Therefore the correct option is (1)