Question

The greenhouse effect is caused when ______.

Options

• infrared rays of longer wavelength are reflected by CO₂ molecules.

• infrared rays of longer wavelength are reflected by CH₄ molecules.

• infrared rays of longer wavelength are reflected by CO₂ and CH₄ molecules.

• none of these

Answer 1

The greenhouse effect is caused when infrared rays of longer wavelength are reflected by CO₂ and CH₄ molecules.

Explanation:

The greenhouse effect occurs when the Earth's surface re-radiates solar energy as long-wavelength infrared radiation. Instead of escaping into space, these heat rays are absorbed and reflected back towards the ground by greenhouse gases like CO₂ and CH₄ molecules. This continuous trapping of thermal energy effectively insulates the atmosphere and keeps the planet warm.