Published by:
CGP EDU Academic Team
Published on: September 12, 2026
The earth radiates in the infra-red region of the spectrum. The spectrum is correctly given by
Text Solution
Verified by ExpertsThe correct answer is:
C
To understand why Planck's law of radiation is the correct choice, we must analyze each of the proposed laws:
- Wien’s Law: This law describes the relationship between the temperature of a black body and the wavelength of its peak emission, stating that as the temperature increases, the peak wavelength decreases. It does not describe the entire spectrum.
- Rayleigh-Jeans Law: This law provides an expression for the spectral energy density at low frequencies but fails at high frequencies, leading to the ultraviolet catastrophe. It does not accurately describe the radiation emitted by the Earth in the infrared region.
- Planck’s Law of Radiation: This law provides a complete description of the electromagnetic radiation emitted by a black body at thermal equilibrium, applying to all wavelengths, including the infrared region. Hence, it accurately describes the spectrum of radiation from the Earth.
- Stefan’s Law of Radiation: This law relates to the total energy radiated per unit surface area of a black body to the fourth power of its temperature. However, it does not describe the spectral distribution.
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
On a clear sunny day, an object at temperature T is placed on the top of a high mountain. An identi…
The velocity of heat radiation in vacuum is
In which process, the rate of transfer of heat is maximum
Which of the following is the correct device for the detection of thermal radiation
A thermos flask is polished well
Heat travels through vacuum by