Question

The electromagnetic radiations are:

a) Visible light

b) IR light

c) UV light

d) Microwaves

The correct order of increasing energy from lowest to highest is:

• A. $d<c<b<a$
• B. $a<b<c<d$
• C. $d<b<a<c$
• D. $b<c<d<a$

Answer 1

The correct option is C $d<b<a<c$

The order of wavelengths of electromagnetic radiations are:
$\text{UV < Visible < IR < microwaves}$

$Energy\propto \frac{1}{wavelength}$

The order of energies is reverse to that of its wavelengths.

Therefore the order of energies of electromagnetic radiations are:

$\text{Microwaves < IR < visible light < UV}$

Hence, option C is correct.