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प्रश्न
The critical angle for glass-air interface is :
पर्याय
24°
48°
42°
45°
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उत्तर
42°
संबंधित प्रश्न
Choose the correct alternative and rewrite the following sentence.
A ray of light strikes the glass slab at an angle of 50°. What is the angle of incidence?
Four students P, Q, R and S traced the path of a ray of light passing through a glass slab for an angle of incidence 40° and measured the angle of refraction. The values as measured them were 18°; 22°; 25° and 30° respectively. The student who has performed the experiment methodically is
(A) P
(B) Q
(C) R
(D) S
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c) Motion of the stars.
d) Changing refractive index of gases in the atmosphere.
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(i) `delta` m, the angle of mínimum devíation
(íí) Any two values of i for which value of `delta` ís same.
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