मराठी

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,

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

  1. the relationship between c and V,
  2. the wavelength of light in glass.
बेरीज
Advertisements

उत्तर

aμg = 1.5, aμg = `"speed of light in air"/"speed of light in glass" = c/V`

  1. μ or c = aμ× V = 1.5 V
  2. aμ= `"wave length of light in air"/"wave length of light in glass"`

∴ wave length of light in glass = `λ/ 1.5`

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 4: Refraction of Light at Plane Surfaces - EXERCISE - 4 (A) [पृष्ठ ८१]

APPEARS IN

सेलिना Concise Physics [English] Class 10 ICSE
पाठ 4 Refraction of Light at Plane Surfaces
EXERCISE - 4 (A) | Q 14. | पृष्ठ ८१

संबंधित प्रश्‍न

 How can you bend light away from the normal?


Draw diagrams to show the refraction of light from 

  1. air to glass, and
  2. glass to air. In each diagram, label the incident ray, refracted ray, the angle of incidence
  3. and the angle of refraction (r).

A postage stamp kept below a rectangular glass block of refractive index 1.5 when viewed from vertically above it, appears to be raised by 7.0 mm. Calculate the thickness of the glass slab.


What is meant by the statement the critical angle for diamond is 24°?


Rahim recorded the following sets of observations while tracing the path of a ray of light passing through a rectangular glass slab for different angles of incidence.

S. No.

Angle of incidence

Angle of refraction

Angle of emergence

I

45°

41°

45°

II

40°

38°

38°

III

45°

41°

40°

IV

41°

45°

41°

The correct observation is recorded at serial number: 

(1) I

(2) II 

(3) III 

(4) IV 


What is the correct reason for blinking / flickering of stars? Explain it.
a) The blasts in the stars.
b) Absorption of star light by the atmosphere.
c) Motion of the stars.
d) Changing refractive index of gases in the atmosphere.


(i) What is the relation between the refractive index of water with respect to air `("_aμ_\text(w))` and the refractive index of air with respect to water `("_\text(w)μ_ a)` .
(ii) If the refractive index of water with respect to air `("_aμ_\text(w))` is`5/3`. Calculate the refractive index of air with respect to water `("_\text(w)μ_ a)` . 


Fill in the blank to complete the following sentence:
When light travels from a rarer to a denser medium, it bends ...........


Briefly, describe an experiment to show that a prism itself produces no colour.

The path of a ray of light coming from air passing through a rectangular glass slab traced by four students are shown as A, B, C and D in the figure. Which one of them is correct?

A B C D

Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×