English
Karnataka Board PUCPUC Science 2nd PUC Class 12

What is the shape of the wavefront in the following case? Light diverging from a point source. - Physics

Advertisements
Advertisements

Question

What is the shape of the wavefront in the following case?

Light diverging from a point source.

Diagram
Short Answer
Advertisements

Solution

The shape of the wavefront in the case of a light diverging from a point source is spherical. The wavefront emanating from a point source is shown in the given figure.

shaalaa.com
  Is there an error in this question or solution?
Chapter 10: Wave Optics - EXERCISES [Page 273]

APPEARS IN

NCERT Physics [English] Class 12
Chapter 10 Wave Optics
EXERCISES | Q 10.2 (a) | Page 273

RELATED QUESTIONS

On the basis of Huygens' wave theory of light prove that velocity of light in a rarer medium is greater than velocity of light in a denser medium.


What is the shape of the wavefront in the following case?

Light emerging out of a convex lens when a point source is placed at its focus.


You have learnt in the text how Huygens’ principle leads to the laws of reflection and refraction. Use the same principle to deduce directly that a point object placed in front of a plane mirror produces a virtual image whose distance from the mirror is equal to the object distance from the mirror.


State Huygen’s principle.


Use Huygens' principle to verify the laws of refraction.


Using Huygens’ principle, verify the laws of reflection at a plane surface.


Using this principle draw a diagram to show how a plane wave front incident at the interface of the two media gets refracted when it propagates from a rarer to a denser medium. Hence verify Snell's law of refraction.


Light waves travel in vacuum along the X-axis. Which of the following may represent the wave fronts?


A plane wave front AB propagating from denser medium (1) into a rarer medium (2) is incident on the surface P1P2 separating the two media as shown in fig.

Using Huygen’s principle, draw the secondary wavelets and obtain the refracted wave front in the diagram.


According to Huygens principle, ______.


According to Huygen's construction, relation between old and new wavefront is ______.


Huygen's conception of secondary waves ______.


Figure shows a standard two slit arrangement with slits S1, S2, P1, P2 are the two minima points on either side of P (Figure). At P2 on the screen, there is a hole and behind P2 is a second 2-slit arrangement with slits S3, S4 and a second screen behind them.


For light diverging from a point source ______.

  1. the wavefront is spherical.
  2. the intensity decreases in proportion to the distance squared.
  3. the wavefront is parabolic.
  4. the intensity at the wavefront does not depend on the distance.

Consider a point at the focal point of a convergent lens. Another convergent lens of short focal length is placed on the other side. What is the nature of the wavefronts emerging from the final image?


What is the shape of the wavefront on earth for sunlight?


Two light beams of intensities in the ratio of 9 : 4 are allowed to interfere. The ratio of the intensity of maxima and minima ______.


According to Huygens’s principle, the amplitude of secondary wavelets is ______.


Using Huygen’s wave theory of light, show that the angle of incidence is equal to the angle of reflection. Draw a neat and labelled diagram.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×