Q. Which among the given parts of the sunlight makes the solar cooker hot

Explanation by: Mr. Dubey

Solar cookers work by trapping heat energy from the sun, primarily from infrared (IR) radiation.
Infrared rays carry heat energy, which gets absorbed by the black surface inside the cooker, raising the temperature and cooking the food.
Why are the other options incorrect?
(A) Red Light → ❌ Visible light (including red) is not responsible for heating.
(B) Ultraviolet (UV) → ❌ UV rays have high energy but do not contribute significantly to heat.
(D) Cosmic Rays → ❌ Cosmic rays are high-energy particles from space, unrelated to solar heating.
Thus, infrared radiation is responsible for making the solar cooker hot.