Question

1) Arrange the following spectral regions in order of increasing energy: infrared, microwave, ultraviolet, visible.

A) microwave < infrared < visible < ultraviolet
B) microwave < visible < infrared < ultraviolet
C) ultraviolet < infrared < visible < microwave
D) ultraviolet < visible < infrared < microwave

Answer 1

The order of increasing energy is as follows

"microwave < infrared < visible < ultraviolet"

Option (A) is correct.

Step-by-step explanation:

Given:

Arrange the following spectral regions in order of increasing energy: infrared, microwave, ultraviolet, visible.

From the formula of energy in terms of frequency.

`E = hf`

Where
`h =` planck constant,
`f =` frequency of light.

From above formula we can conclude that higher frequency means higher energy.

In our case ultraviolet has higher frequency and microwave has lower frequency.

So ultraviolet has higher energy and microwave has lower energy.

microwave < infrared < visible < ultraviolet

Therefore, the order of increasing energy is as follows

"microwave < infrared < visible < ultraviolet"