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प्रश्न
A light ray in passing from water to a medium
(a) speeds up
(b) slows down. In each case, give one example of the medium.
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उत्तर
When the speed increases it means that the refractive index of the medium is less than that of water.
When the speed decreases it means that the refractive index of the medium is greater than that of water.
संबंधित प्रश्न
A ray of light enters a glass slab ABDC as shown in figure and strikes at the centre O of the circular part AC of the slab. The critical angle of glass is 42°. Complete the path of the ray till it emerges out from the slab. Mark the angles in the diagram wherever necessary.
Trace the path of a ray of light incident at an angle of 45° on a rectangular glass slab. Write the measure of the angle of refraction, the angle of emergence and the lateral displacement suffered by the ray as it passes through the slab.
Observe the figure and write accurate conclusion regarding refraction of light.
Using the curve, how do you infer that for given prism, the angle of minimum deviation δmin is unique for the given light?
A glass slab is placed over a page on which the word VIBGYOR is printed with each letter in its corresponding colour.
- Will the image of all the letters be in the same place?
- If not, the state which letter will be raised to the maximum. Give a reason for your answer.
Draw ray of light bending towards the normal while passing from air to glass. Label your diagrams.
Two parallel rays of Red and Violet travelling through the air, meet the air-glass boundary as shown in the above figure. Will their paths inside the glass be parallel? Give a reason for your answer.
The velocity of light in diamond is 121000 kms-1. What is its refractive index?
A ray of light is incident at an angle of 45° on one face of a rectangular glass slab of thickness 10 cm and refractive index 3/2. Calculate the lateral shift produced ______.
