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प्रश्न
A ray of light incident at an angle of incidence ‘i’ passes through an equilateral glass prism such that the refracted ray inside the prism is parallel to its base and emerges from the prism at an angle of emergence ‘e’.
What can you say about the value of the angle of deviation in such a situation?
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उत्तर
Angle of deviation becomes minimum in this situation.
संबंधित प्रश्न
State two conditions necessary for total internal reflection to occur.
Draw diagram to illustrate the total internal reflection.
Plot a graph between
Angle of incidence versus angle of refraction.
(a) A ray of monochromatic light enters glass PQRS as shown in the fig. Complete the path of ray till it emerges from the glass. (Critical angle of glass is 420).
(b) Draw diagram of a prism periscope.
(c) What are the advantages of total internal reflecting prism over plane mirror?
Can light be ‘piped’ like sound in a doctor’s stethoscope?
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.
The angle of incidence at which the angle of refraction is Q£ is called the critical angle.
What is the phenomenon used in optical fiber? Explain.
A ray of light passes from vacuum into a medium of refractive index µ, the angle of incidence is found to be twice the angle of refraction. Then the angle of incidence is ______.
Small air bubbles rising up a fish tank appear silvery when viewed from some particular angle is due to the ______.
