Question

______________ is responsible for the green house effect.

• A. Infrared rays
• B. Ultraviolet ray
• C. X- rays
• D. Radio waves

Answer 1

The correct option is A

Infrared rays

Explanation for the correct option

Option (A): Infrared rays

1. The sun's electromagnetic radiation passes through the atmosphere.
2. Some of it is absorbed by the atmosphere, while the rest reaches the earth's surface.
3. The wavelength range that reaches the earth will be in the infrared.
4. The absorbed heat energy is then released as infrared radiation by the plants and soil. Infrared radiation is subsequently absorbed by the greenhouse's glass, which releases some of it back into space. This keeps the greenhouse warm even when the outside temperature is lower.

Explanation for the incorrect option(s):

Option (B): Ultraviolet ray

1. The Sun is the most powerful source of UV radiation on Earth, but there are numerous more.

Option (C): X- rays

1. In today's medicine, X-ray scans of the body are a must-have diagnostic tool.
2. Medical imaging can identify dental cavities, bone fractures, foreign objects, and malignant illnesses like cancer noninvasively.

Option (D): Radio waves

1. Radio waves are utilized for communication, as well as nautical and aviation navigation, and for wireless transfer of sound messages or information.

Therefore infrared rays are responsible for the greenhouse effect.

Hence, the correct option is (A).