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Question
What is meant by the statement the critical angle for diamond is 24°?
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Solution
The critical angle for diamond is 24°. This implies that at an incident angle of 24° within the diamond the angle of refraction in the air will be 90°. And if incident angle will be more than this angle then the ray will suffer total internal reflection without any refraction.
RELATED QUESTIONS
The speed of light in glass is 2 × 105 km/s. What is the refractive index of glass?
With the help of diagram of the principal section of a prism, indicate its refracting surfaces, refracting edge and base.
While tracing the path of a ray of light passing through a rectangular glass slab a student tabulated his observations as given below:
|
S.NO. |
∠i |
∠r |
∠e |
|
I |
60° |
40° |
61° |
|
II |
50° |
36° |
51° |
|
III |
40° |
28° |
39° |
|
IV |
30° |
20° |
31° |
The correct observations is:
(A) I
(B) II
(C) III
(D) IV
How does the deviation produced by a prism depend on the wavelength of incident light?
Does the depth of a tank of water appear to change or remain the same when viewed normally from above?
State the factors on which the angle of deviation depends.
Can the absolute refractive index of a medium be less than one?
In what condition a prism is said to be in the position of minimum deviation? What is the direction of the refracted ray inside the prism in this condition?
Draw a diagram of a prism and label:
(i) the base,
(ii) the refracting surfaces,
(iii) the refracting edge,
(iv) the refracting angle in it.
