Advertisements
Advertisements
प्रश्न
Can the absolute refractive index of a medium be less than one?
Can the value of the absolute refractive index be lesser than 1?
Advertisements
उत्तर
No, the absolute refractive index of a medium cannot be less than one because the speed of light in any medium is always less than that in a vacuum.
संबंधित प्रश्न
Draw the diagram given below and clearly show the path taken by the emergent ray.
Which colour of light travels fastest in any medium except air?
For which colour of white light, is the refractive index of a transparent medium the most?
When light travels from a rarer to a denser medium, its speed ______.
The highest refractive index is of ______.
How does the speed of light change when it passes from glass to water?
Fig 4.31 below shows a light ray of single colour incident normally on two prisms A and B. In each case draw the path of the ray of light as it enters and emerges out of the prism. Mark the angle wherever necessary.
A coin is places at the bottom of a beaker containing water (refractive index = 4/3) to a depth of 12 cm. By what height the coin appears to be raised when seen from vertically above?
Select from the following the best experimental set-up for tracing the path of a ray of light through a glass slab:
(A) I
(B) II
(C) III
(D) IV
How does the deviation produced by a prism depend on the wavelength of incident light?
The critical angle for glass-air interface is :
A ray of light passes from water to air. How does the speed of light change?
A fish swimming in a pond seems nearer than it really is. Explain.
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.
You are provided with a printed piece of paper. Using this paper how will you differentiate between a convex lens and a concave lens?
A ray of monochromatic light is incident from the air on a glass slab:
(i) Draw a labelled ray diagram showing the change in the path of the ray till it emerges from the glass slab.
(ii) Name the two rays that are parallel to each other.
(iii) Mark the lateral displacement in your diagram.
A glass block is having refractive index 3/2, the light ray is incident at an angle 45°. Find the sine of the angle of, refraction inside the glass block.
Observe the figure and name the ray AB, ray CD, ray GH.
