7
Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A) : January is the coldest month at Delhi
Reason (R) : The earth gets minimum radiation as the sun-earth distance is maximum in January
In light of the above statements, choose the correct answer from the options given below.
EXPLANATION
Earth Spheres , Vertical Thermal Stratificati
- Assertion (A) is True: Delhi experiences a continental semi-arid climate where January is consistently the coldest month of the year due to cold northwesterly winds descending from the Himalayas following western disturbances.
- Reason (R) is False: The Earth is actually at perihelion (closest to the Sun, $\approx 147.1\text{ million km}$) in early January, and at aphelion (farthest from the Sun, $\approx 152.1\text{ million km}$) in early July.
- Climatic Mechanism: Winter in Delhi is caused by the $23.5^\circ$ axial tilt of the Earth tilting the Northern Hemisphere away from the Sun, reducing solar declination and daily insolation, not the Earth-Sun distance.
Correct option: (3) (A) is true but (R) is false
Explanation not matching this question?
क्या व्याख्या इस प्रश्न से मेल नहीं खा रही?
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