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प्रश्न
Draw a ray diagram to show the refraction of a monochromatic ray through a prism when it suffers a minimum deviation. How is the angle of emergence related to the angle of incidence in this position.
उत्तर
The refraction of a monochromatic light beam through a prism when it experiences the lowest deviation is depicted in the diagram below:
The angle of emergence = the angle of incidence in the minimum deviation position prism in minimum deviation position ∠i = ∠e
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संबंधित प्रश्न
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°?
How does the angle of deviation depend on the refracting angle of the prism?
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 incident at an angle of incidence 48° on a prism of refracting angle 60° suffers minimum deviation. Calculate the angle of minimum deviation.
[Hint: δmin = 2i - A]
What should be the angle of incidence for a ray of light which suffers a minimum deviation of 36° through an equilateral prism?
[Hint: A = 60°, i = (A + δmin)/2]
Assertion: The light emerges from a parallel-sided glass slab in a direction perpendicular to that in which enters the glass slab.
Reason: The perpendicular distance between the original path of the incident ray and the emergent ray coming out of the glass slab is called lateral displacement of the emergent ray of light.
A prism ABC (with BC as base) is placed in different orientations. A narrow beam of white light is incident on the prism as shown in below Figure. In which of the following diagrams, after dispersion, the third colour from the top of the spectrum corresponds to the colour of the sky?
How will you use two identical prisms so that a narrow beam of white light incident on one prism emerges out of the second prism as white light? Draw the diagram.
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.
