Q: Which mirror is best suited to focus parallel rays at a point? समानान्तर किरणों को एक बिन्दु पर केन्द्रित करने के लिए सबसे उपयुक्त कौन-सा दर्पण होता है?
A.
Spherical convex/उत्तल गोलीय
B.
Spherical concave/अवतल गोलीय
C.
Hyperbolic/ अतिपरवलयी
D.
Parabolic/परवलयी
Correct Answer:
Option D -
Explanations:
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