Advertisements
Advertisements
प्रश्न
Calculate the velocity of light in a glass block of refractive index 1.5. (Velocity of light in air = 3 × 108 m/s)
उत्तर
`"V"_"air"/"V"_"glass"=mu_"glass"/mu_"air"`
or Vglass = `3xx10^8xx1/1.5`
= 2 × 108 m/s.
APPEARS IN
संबंधित प्रश्न
The highest refractive index is of ______.
How does the angle of minimum deviation produces by a prism change with increase in :
the wavelength of incident light
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.
The refractive index of air with respect to glass is expressed as `""_g μ_a=sin i /sin r`.
- Write down a similar expression for aμg in terms of the angles i and r.
- If angle r = 90°, what is the corresponding angle i called?
- What is the physical significance of the angle i in part (b)?
Select from the following the best set-up for tracing the path of a ray of light through a rectangular glass slab:
(A) I
(B) II
(C) III
(D) IV
Draw a diagram to show the splitting of white light into its constituent colours.
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.
What is the refractive index of vacuum
What should be the ratio of the speed of light through the liquid to the speed through the glass so that there is no refraction of light at the boundaries of the glass block when the system is illuminated by the light of one colour?
