Target Exam

CUET

Subject

Physics

Chapter

Electromagnetic Waves

Question:

Choose the correct statements regarding infra red waves from the following.

(A) Infra red waves produced by hot bodies and molecules.
(B) This radiation is trapped by greenhouse gases such as $CO_2$ and water vapour.
(C) These waves are used in earth satellites.
(D) Exposure to these radiation induces the production of more melanin.
(E) These radiations are used in eye surgery.

Choose the correct answer from the options given below:

Options:

(A), (D) and (E) only

(A), (B) and (C) only

(B), (C) and (D) only

(C), (D) and (E) only

Correct Answer:

(A), (B) and (C) only

Explanation:

The correct answer is Option (2) → (A), (B) and (C) only

(A) Infrared region is indeed emitted by hot bodies and molecules, especially those at temperature lower than those emit visible light.

(B) Infrared Radiation is trapped by greenhouse gasses like $CO_2$ and water vapour, contributing to greenhouse effect.

(C) Infrared waves are used in earth's satellite for various purposes, including remote sensing and imaging.