Question

Electromagnetic radiation with maximum wavelength is?

• A. Radiowave
• B. X-ray
• C. Infrared ray
• D. Ultraviolet ray

Answer 1

The correct option is A

Radiowave

Explanation of correct option:

In the case of option A,

1. The electromagnetic waves with the largest wavelength in the electromagnetic spectrum are called radio waves.
2. Radio waves have been used to transmit radio and television transmissions; microwaves, which are employed in radar and microwave ovens, are indeed radio waves.

The explanation for the incorrect options:

In the case of option B,

1. A kind of electromagnetic radiation comparable to visible light is called X-rays.
2. X-rays, on the other hand, have higher energy and can penetrate through most things, including the body. Medical x-rays produce pictures of tissues and structures within the body.

In the case of option C,

1. Infrared waves are created by heated bodies, they are also characterized as heat waves.
2. Their wavelength is shorter than that of radio waves and microwaves. Water rapidly absorbs them.

In the case of option D,

1. Invisible rays that are a component of the sun's energy are called ultraviolet rays.
2. Sunlamps and sun exposure emit ultraviolet rays as well.

Therefore, option A is the correct choice.