Question

Which radiation is used in treatment of muscle ache?
A. Ultraviolet
B. Infrared
C. Microwave
D. X-rays

Answer 1

Hint: First we need to analyze each of the ray and then after from there definition we can find the ray that is used in the treatment of muscle ache. Different radiation is used in different treatments. The use of this radiation depends on its wavelength and frequency.

Complete answer:
Analyzing each radiation given in the options:
Ultraviolet radiation: Ultraviolet radiation is defined as the radiation that is a form of non-ionizing radiation which is emitted by the sun and artificial sources. It is a beneficial radiation and used in both industries and medicine. Uses of ultraviolet radiation are killing of bacteria, creating fluorescent effects, phototherapy etc.

Infrared radiation: Infrared is normally called infrared light and is defined as the electromagnetic radiation whose wavelength is longer than the visible light and therefore it is invisible to the human eye. It is used in the treatment of pain relief, reduction of muscle tension or we can say muscle ache, lowering blood pressure and many more.

Microwave radiation: Microwave is defined as a form of electrometric radiation whose frequency ranges in between $300\,MHz - 300\,GHz$. It is used in many household appliances, in industries and also used in many medical purposes.

X-rays: It is defined as a ray that is an electromagnetic wave of high energy and very short wavelength which is able to pass through many materials that are opaque to light. The most common use of this ray is to create pictures of the inside of our body.

Now on comparing all these for radiation we can conclude that Infrared radiation is used in treatment of muscle ache. Therefore the correct option is B.

Note: Remember that the ultraviolet wavelength ranges from $100\,nm - 400\,nm$ and is divided into three different bands UVA, UVB and UVC. Similarly the wavelength of infrared varies from $780\,nm - 1\,mm$, microwave radiation varies from $1\,m - 1\,mm$ and X-rays varies from ${10^{ - 8}}\,m - {10^{ - 12}}\,m$.