Question

The electromagnetic waves that cause greenhouse effect are

• A. X-rays
• B. Cathode rays
• C. UV rays
• D. Gamma rays
• E. Infrared rays

Answer 1

Answer: (E)

The greenhouse effect is caused by the trapping of infrared radiation by the Earth's atmosphere. Infrared rays have longer wavelengths than visible light and ultraviolet (UV) rays. These rays are absorbed by gases such as carbon dioxide and water vapor in the atmosphere, contributing to the warming of the Earth's surface.
(A) X-rays
(B) Cathode rays
(C) UV rays
(D) Gamma rays are not responsible for the greenhouse effect.

(E) Infrared rays are the primary electromagnetic waves responsible for the greenhouse effect, as they are absorbed by the greenhouse gases and trapped within the Earth's atmosphere, leading to warming.

The correct option is (E) : Infrared rays

Answer 2

The electromagnetic waves that cause greenhouse effect are:

✅ Infrared rays
→ Greenhouse gases trap infrared radiation emitted by the Earth's surface, preventing heat from escaping into space. This leads to the greenhouse effect.

Incorrect options: 
❌ X-rays: High-energy radiation, not involved in greenhouse effect.
❌ Cathode rays: Streams of electrons, not electromagnetic waves.
❌ UV rays: Mostly absorbed by the ozone layer; not responsible for greenhouse effect.
❌ Gamma rays: Highly energetic and unrelated to atmospheric heating.

Correct answer: Infrared rays