Question

Fill in the blanks, according to the Greenhouse effect.
$1.$ Clouds and gases reflect about $\dots a\dots$ of the incoming solar radiation, and absorb some of it but almost $\dots b\dots$ of incoming solar radiation falls on Earth’s surface heating it, while a small proportion is reflected back.
$2.$ Earth’s surface re-emits heat in the form of $\dots c\dots$ radiation but part of this does not escape into space as atmospheric gases absorb a major fraction of it.

• A. a-one fourth, b-one half, c-infrared radiation
• B. a-one half, b-one fourth, c-UV radiation
• C. a-one fourth, b-one half, c-UV radiation
• D. a-one half, b-one fourth, c-infrared radiation

Answer 1

The correct option is A a-one fourth, b-one half, c-infrared radiation

Greenhouse effect
The greenhouse effect is the phenomenon of heating the Earth’s surface. This is due to the absorption of the longwave infrared radiations by the greenhouse gases such as $C{O}_2,C{H}_4$ and re-emit these radiations towards the surface of the Earth.

Amount of solar radiation absorbed and reflected back
Clouds and gases present in the atmosphere reflect one-fourth of the solar radiation falling on the Earth’s surface.
However, half of the solar radiation coming from the Sun heats the Earth’s and a small proportion of the incoming solar radiation is reflected back

Infrared radiation
The heat is re-emitted by the Earth's surface in the form of infrared radiation but part of this heat does not escape into space as atmospheric gases (e.g., carbon dioxide, methane, etc.) absorbs a major fraction of these radiations.

Final answer
(d) a—one fourth, b—one half, c—infrared radiation