Question

To which part of the electromagnetic spectrum does a wave of frequency $3 \times {10^{13}}Hz$ belong?

Answer 1

Hint:The region between frequencies ${10^{12}}$ _to ${10^{14}}Hz$ is the infrared region. Electromagnetic radiations are usually expressed in terms of frequency, wavelength or energy.

Complete step by step answer:
First let us consider the electromagnetic spectrum. It covers a different range of all types of electromagnetic radiations. Such as microwaves, infrared, ultraviolet, X-rays etc. There are radiations below $1Hz$ to ${10^{25}}Hz$ frequencies in the spectrum. These are divided into different bands and are known with different names. They also have different properties and characteristics.

Now we see that waves of frequency $3 \times {10^{13}}Hz$ belong to the infrared region.
The region between frequencies ${10^{12}}$ to ${10^{14}}Hz$ is the infrared region and is divided into three regions based on wavelengths. Far, mid and near infrared. These infrared rays are not visible to human eyes but we detect it as heat. Repeated exposures with infrared can cause pain in skin and eyes.

As we know there are other uses of infrared rays in our life. Infrared thermal imaging techniques are used for safety and security purposes such as surveillance, tracking, detecting overheating etc. It is also used in night vision cameras.

Infrared have longer wavelengths than our visible light. Therefore it can pass through different objects that visible light cannot. And also when it encounters an object it causes the molecules to vibrate faster. Here a transfer of energy occurs as heat.

Note:We humans come into contact with infrared everyday but it is not visible to our human eyes. Most of the portion of the electromagnetic spectrum is not visible to human eyes. The parts visible to humans are called the visible light.