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प्रश्न
Fill in the blanks to complete the following sentence
When light travels from a denser to a rarer medium, its speed ……………….
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उत्तर
When light travels from a denser to a rarer medium, its speed increases
संबंधित प्रश्न
Draw a ray diagram to show the refraction of a monochromatic ray through a prism when it suffers minimum deviation
Write a relationship between the angle of incidence and angle of refractions for a given pair of media
Name the colour of white light which is deviated the most on passing through a prism.
A Water pond appears to be 2.7 m deep. If the refractive index of water is 4/3, find the actual depth of the pond.
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
Fig shows a lens as a combination of a glass block and two prisms.
(i) Name the lens formed by the combination.
(ii) What is the line XX' called?
(iii) Complete the path of the incident ray PQ after passing through the lens.
(iv) The final emergent ray either meets XX' at a point or appears to come from a point on XX'. Label it as F, What is this point called?
A total reflecting equilateral prism can be used to deviate a ray of light through:
What is the refractive index of water
Explain briefly what causes the twinkling of stars at night.
