Question
Match the atmospheric optic phenomenon with the causative processes
A. Rainbows P. Refraction B. Mirage Q. Refraction and Reflection C. Corona R. Refraction, Reflection, Dispersion in ice crystals D. Halo S. Diffraction
The correct answer is
A : Q, B : P, C : S, D : R
Atmospheric Optic Phenomena Matching Solution
This solution explains the physical processes behind common atmospheric optic phenomena.
Phenomenon Causation
- A. Rainbows are formed due to refraction and reflection of sunlight by water droplets in the atmosphere. Dispersion also plays a role in separating colors. The closest match is Q.
- B. Mirages are caused by the refraction of light rays as they pass through layers of air with different temperatures and densities. The correct process is P.
- C. Coronae are optical phenomena appearing as colored rings around the sun or moon, caused by the diffraction of light by small water droplets or ice crystals. The matching process is S.
- D. Halos are typically observed around the sun or moon and are formed by the refraction of sunlight through ice crystals suspended in the atmosphere. Processes involved include refraction, reflection, and dispersion. The best fit is R.
Correct Matching
Based on the analysis:
- A matches with Q (Refraction and Reflection)
- B matches with P (Refraction)
- C matches with S (Diffraction)
- D matches with R (Refraction, Reflection, Dispersion in ice crystals)
The correct combination is A : Q, B : P, C : S, D : R.
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- The wavelength/colour at which solar radiation peaks is
- Which of the following is correct?
- Calculate the percentage change in the solar radiation incident on top of the Earth's atmosphere when the Earth is closest to the Sun, i.e., when the Earth - Sun distance is $147 \times 10^6 \text{ km}$. The mean distance is $149.6 \times 10^6 \text{ km}$.
- $\lambda_{max}$ of radiation emitted by a black body at 4000 K in vacuum is:
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