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प्रश्न
A green light is incident from the water to the air-water interface at the critical angle (C). Select the correct statement.
विकल्प
The entire spectrum of visible light will come out of the water at an angle of 90° to the normal.
The spectrum of visible light whose frequency is less than that of green light will come out to the air medium.
The spectrum of visible light whose frequency is more than that of green light will come out to the air medium.
The entire spectrum of visible light will come out of the water at various angles to the normal.
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उत्तर
The spectrum of visible light whose frequency is less than that of green light will come out to the air medium.
Explanation:
`sin i_C = 1/n` and `n prop 1/lambda`
For greater wavelength (i.e., lesser frequency) n is less. Hence, iC would be more. Thus, these wavelengths will not suffer internal reflection and come out at angles less than 90°.
संबंधित प्रश्न
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Questions:
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- Draw the diagrams of three observations made by Swarali.
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What are the conditions to achieve total internal reflection?
What are the examples of total internal reflection in nature?
A ray of light incident at an angle θ on a refracting face of a prism emerges from the other face normally. If the angle of the prism is 5° and the prism is made of a material of refractive index 1.5, the angle of incidence is ______.
Find the value of θ in the given figure.
When a ray of light is refracted from one medium to another, then the wavelength changes from 6000 Å to 4000 Å. The critical angle for the interface will be ______.
