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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
A ray of light travels from water to air as shown in the diagram given below :
1) Copy the diagram and complete the path of the way. Given the critical angle for water is 48°.
2) State the condition so that internal reflection occurs in the above diagram.
The adjacent diagram shows two right-angled isosceles prisms A and B. Complete the diagram to show the path of rays P and Q emerging out of the prism B. What principles have you used to complete the diagram?
A spherical marble, of refractive index 1.5 and curvature 1.5 cm, contains a tiny air bubble at its centre. Where will it appear when seen from outside?
A green light is incident from the water to the air-water interface at the critical angle (C). Select the correct statement.
For a ray of light, the critical angle is minimum when it travels from ______.
Optical Fibres are based on the phenomenon of dispersion.
What are the conditions to achieve total internal reflection?
A rectangular block of glass ABCD has a refractive index 1.6. A pin is placed midway on the face AB (Figure). When observed from the face AD, the pin shall ______.
- appear to be near A.
- appear to be near D.
- appear to be at the centre of AD.
- not be seen at all.
A Rainbow is a beautiful natural phenomenon formed because of the following:
Find the value of θ in the given figure.
