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प्रश्न
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.
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उत्तर
- The image of all the letters of the word VIBGYOR in their corresponding colours will not be at the same place.
- The letter of violet colour (i.e. V) appears to be raised maximum, while the letter of red colour (i.e. R) appears to be raised minimum.
Since apparent depth = `"real depth"/"refractive index"` and the refractive index of glass is most for the violet light while least for the red light, therefore the apparent depth is least for violet and most for the red.
संबंधित प्रश्न
When rays of light are incident on a glass slab then the incident ray and emergent ray are _________ each other.
- perpendicular
- parallel
- opposite
- concurrent
Which colour of light travels fastest in any medium except air?
A ray of light strikes the surface of a rectangular glass block such that the angle of incidence in
air is 0°.
In each case, draw diagram to show the path taken by the ray as it passes through the glass block and emerges from it.
The critical angle for glass-air interface is :
What is the total reflecting prism?
Name two instruments of the total refracting prism in which is used.
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 diagram shows the path of a ray of light through a rectangular glass block placed in a liquid of uniform density.
(a) Does the light speed up or slow down in the glass,
(b) Give the reason for your answer.
Trace a ray of light incident at 30° on a surface if travelling from air to glass. What is the angle of refraction in this case? (R.I. for glass = 3/2).
Consider these indices of refraction: glass: 1.52; air: 1.0003; water: 1.333. Based on the refractive indices of three materials, arrange the speed of light through them in decreasing order.
