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प्रश्न
How does a ray of light bend when it travels from denser to rarer medium.
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उत्तर
When a ray of light travels from denser to rarer medium it bends away from the normal.
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संबंधित प्रश्न
State the relation between the critical angle and the absolute refractive index of a medium.
State two conditions necessary for total internal reflection to occur.
The observation made by Swarali while doing the experiment is given below. Based on these write answers to the questions:
Swarali found that the light ray travelling from the denser medium to rarer medium goes away from the normal. If the angle of incidence (i) is raised by Swarali, the angle of refraction (r) went on increasing. However, after certain value of the angle of incidence the light ray is seen to return back into the denser medium.
Questions:
- What is the specific value of∠i called?
- What is the process of reflection of incident rays into denser medium called?
- Draw the diagrams of three observations made by Swarali.
How does a ray of light bend when it travels from when it is normal to the interface of the two media.
A ray of light is incident as a normal ray on the surface of separation of two different mediums. What is the value of the angle of incidence in this case?
The twinkling effect of star light is due to ______.
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.
The angle made by incident ray of light with normal of the reflecting surface is called ______.
An endoscope uses optic fiber to transmit high resolution images of internal organs without loss of information. The principle of light that is used by the optic fiber is based on ______.
