Advertisements
Advertisements
प्रश्न
A monochromatic ray of light passes from air to glass. The wavelength of light in air is λ, the speed of light in air is c and in glass is V. If the absolute refractive index of glass is 1.5, write down
- the relationship between c and V,
- the wavelength of light in glass.
Advertisements
उत्तर
aμg = 1.5, aμg = `"speed of light in air"/"speed of light in glass" = c/V`
- μ or c = aμg × V = 1.5 V
- aμg = `"wave length of light in air"/"wave length of light in glass"`
∴ wave length of light in glass = `λ/ 1.5`
APPEARS IN
संबंधित प्रश्न
Choose the correct alternative and rewrite the following sentence.
A ray of light strikes the glass slab at an angle of 50°. What is the angle of incidence?
Why do we get a spectrum of seven colors when white light is dispersed by a prism?
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
Fig shows a lens as a combination of a glass block and two prisms.
(i) Name the lens formed by the combination.
(ii) What is the line XX' called?
(iii) Complete the path of the incident ray PQ after passing through the lens.
(iv) The final emergent ray either meets XX' at a point or appears to come from a point on XX'. Label it as F, What is this point called?
Fig. shows a ray of white light that passes through a prism and produces a spectrum.
(a) Name the phenomenon that is taking place.
(b) What colour would you see at X and Y?
(c) What radiation would you detect above X and below Y?
Why upper surface of water contained in a beaker and above eye level appears silvery?
State the factors on which the angle of deviation depends.
Name two instruments of the total refracting prism in which is used.
Draw ray of light bending towards the normal while passing from glass to water. Label your diagrams.
