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प्रश्न
Name the colour of white light which is deviated the least on passing through a prism.
उत्तर
Red colour will deviate the least on passing through a prism.
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संबंधित प्रश्न
Define the term angle of deviation.
Diagrams (a) and (b) in figure below show the refraction of a ray of light of single colour through a prism and a parallel sided glass slab respectively.
- In each diagram, label the incident, refracted, emergent rays and the angle of deviation.
- In what way the direction of emergent ray in the two cases differ with respect to the incident ray? Explain your answer.
A ray of light incident at an angle of incidence i1 passes through an equilateral glass prism such that the refracted ray inside the prism is parallel to its base and emerges at an angle of emergence i2.
- How is the angle of emergence ‘i2’ related to the angle of incidence ‘i1’.
- What can you say about the angle of deviation in such a situation?
A light ray of yellow colour is incident on an equilateral glass prism at an angel of incidence equal to 48° and suffers minimum deviation by an angle of 36°.
- What will be the angle of emergence?
- If the angle of incidence is changes to (a) 30°, (b) 60°, state whether the angle of deviation will be equal to, less than or more than 36°?
A ray of light is normally incident on one face of an equilateral glass prism. Answer the following:
What is the angle of incidence on the first face of the prism?
A ray of light suffers refraction through an equilateral prism. The deviation produced by the prism does not depend on the ______.
Draw a ray diagram showing the dispersion through a prism when a narrow beam of white light is incident on one of its refracting surfaces. Also indicate the order of the colours of the spectrum obtained.
The diagram below shows the ray OP travelling through an equilateral prism of a certain material.
- Calculate the value of i2, if the angle of deviation is 43°.
- What is the ray QS called?
A monochromatic ray of light is incident on an equilateral prism placed at minimum deviation position with an angle of incidence 45° as shown in the diagram?
- Copy the diagram and complete the path of the ray PQ.
- State two factors on which the angle of deviation depends.
White light is dispersed by a prism. Inside the prism, compared to the blue light, the red light ______.
