Sources of Energy
Quick practice
Question 1 of 5
In which case is the angle of incidence (i) and angle of refraction (r) equal in a transparent slab when ∠i=∠r= ?
किस स्थिति में परावर्तन का कोण ( i ) का घटनां और अपवर्तन कोण (r) पारदर्शी बर्फ के सिल्ली में बराबर होते हैं जब ∠ i = ∠ r =?
A
90°
B
45°
C
depends on the material of the slab.
पदार्थ की सामग्री पर
D
0°
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