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प्रश्न
State two advantages of using a right-angle prism as a reflector, rather than a plane mirror.
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उत्तर
(i) There is no absorption of light in a prism and hence the image is brighter.
(ii) Image is sharper in case of the prism.
संबंधित प्रश्न
Name the factors affecting the critical angle for the pair of media.
How does a ray of light bend when it travels from rarer to denser medium
How does a ray of light bend when it travels from denser to rarer medium.
Why do diamonds sparkle?
PQ and PR are two light rays emerging from the object as shown in the figure below:
(i) What is the special name given to the angle of incidence (∠PQN) of ray PQ?
(ii) Copy the ray diagram and complete it to show the position of the image of the object P when seen obliquely from above.
(iii) Name the phenomenon that occurs if the angle of incidence ∠PQN is increased still further.
Answer the following question.
Define the critical angle of incidence and obtain an expression for it.
Answer the following question.
Why is prism binoculars preferred over traditional binoculars? Describe its working in brief.
The resultant `vec"R"` of `vec"P"` and `vec"Q"` is perpendicular to `vec"P"`. Also `|vec"P"|=|vec"R"|`. The angle between `vec"P"` and `vec"Q"` is ______.
[tan 45° = 1]
The outer concentric shell in optic fiber is called ______.
Observe the given figure of the raindrop and answer the following questions:
- Label A and B of the given diagram. Why colour will deviate most.
- Name the phenomenon shown in label C.
