Home
Class 12
PHYSICS
In the case of light waves from two cohe...

In the case of light waves from two coherent sources `S_(1)` and `S_(2)`, there will be constructive interference at an arbitrary point P, the path difference `S_(1)P - S_(2)P` is

A

`(n+(1)/(2))lambda`

B

`n lambda`

C

`(n- (1)/(2))lambda`

D

`(lambda)/(2)`

Text Solution

Verified by Experts

The correct Answer is:
B

Constructive interference occurs when the path difference `(S_(1)P-S_(2)P)` is an integral multiple of `lambda`.
or `S_(1)P-S_(2)P =n lambda`
where `n = 0,1,2,3, …`
Promotional Banner

Topper's Solved these Questions

  • WAVE OPTICS

    NCERT FINGERTIPS ENGLISH|Exercise HIGHER ORDER THINKING SKILLS|8 Videos
  • WAVE OPTICS

    NCERT FINGERTIPS ENGLISH|Exercise NCERT EXEMPLAR PROBLEMS|5 Videos
  • SEMICONDUCTOR ELECTRONICS : MATERIALS , DEVICES AND SIMPLE CIRCUITS

    NCERT FINGERTIPS ENGLISH|Exercise Assertion And Reason|15 Videos

Similar Questions

Explore conceptually related problems

In Young's double slit experiment, an interference pattern is obtained on a screen by a light of wavelength 6000Å , coming from the coherent sources S_1 and S_2 . At certain point P on the screen third dark fringe is formed. Then the path difference S_1P-S_2P in microns is

Two coherent sources S_1" and "S_2 produce interference fringes. If a thin mica plate is introduced in the path of light from S_(1) then the central maximum

Two coherent sources S_(1)" and "S_(2) are separated by a small distance d. The fringes obtained on the screen will be:

When light from two sources (say slits S_(1) and S_(2) ) interfere, they form alternate dark and bright fringes. Bright fringe is formed at all point where the path difference is an odd multiple of half wavelength. At the condition of equal amplitudes, A_(1) = A_(2) = a , the maximum intensity will be 4 a^(2) and the visibility improves, The resultant intensity can also be indicated with phase factor as I = 2 a^(2) cos^(2) (phi // 2) .Using this passage, answer the following questions. If the slits S_(1) and S_(2) are arranged as shown in Fig. the ratio of intensity of fringe at P and R is

In the arrangement shown, a screen is placed normal to the line joining the two point coherent sources S_(1) and S_(2) . The interference pattern consist of concentric circles. lambda is the wavelength of light (D gt gt d) . The phase difference of the interfering light at point P is

Two waves of equal amplitude a from two coherent sources (S_1 & S_2) interfere at a point R such that S_2R-S_1R =1.5 lambda The intensity at point R Would be

The wavelength of sound waves arriving at P from two coherent sources S_1 and S_2 is 4 m as shown. While intensity of each wave is I_0 the resultant intensity at point P is 2I_0 find minimum value of x

Consider two coherent, monochromatic (wavelength lambda ) sources S_(1) and S_(2) , separated by a distance d. The ratio of intensities of S_(1) and that of S_(2) (which is responsible for interference at point P, where detector is located) is 4. The distance of point P from S_(1) is (if the resultant intensity at point P is equal to (9)/(4) times of intensity of S_(1) ) ("Given : "angleS_(2)S_(1)P=90^(@), d gt0 and n" is a positive integer")

In figure, a screen is placed normaol to the line joining the two point coherent sources S_(1) and S_(2) . The interference pattern consists of concentric circles. Also, find the value of radius for this ring.

Two coherent point sources S_1 and S_2 are separated by a small distance d as shown. The fringes obtained on the screen will be

NCERT FINGERTIPS ENGLISH-WAVE OPTICS-Assertion And Reason
  1. In the case of light waves from two coherent sources S(1) and S(2), th...

    Text Solution

    |

  2. Assertion : The frequencies of incident, reflected and refracted beam ...

    Text Solution

    |

  3. Assertion: When a light wave travels from a rarer to a denser medium, ...

    Text Solution

    |

  4. Assertion : Wavefronts obtained from light emitted by a point source i...

    Text Solution

    |

  5. Assertion : When a plane wave passes through a thin prism, the emergin...

    Text Solution

    |

  6. Assertion : The increase in wavelength due to doppler effect is termed...

    Text Solution

    |

  7. Assertion : Interference is not observed if the two coherent slit sour...

    Text Solution

    |

  8. Assertion : When a thin transparent sheet is placed in front of both t...

    Text Solution

    |

  9. Statement-I : In Young's double slit experiment interference pattern d...

    Text Solution

    |

  10. Assertion : The fringe closest on either side of the central white fri...

    Text Solution

    |

  11. Assertion : All bright interference bands have same intensity. Reaso...

    Text Solution

    |

  12. Assertion : If we look clearly at the shadow cast by an opaque object,...

    Text Solution

    |

  13. Assertion : If the light from an ordinary source passes through a pola...

    Text Solution

    |

  14. Assertion : Sound waves cannot be polarised. Reason : Sound waves ar...

    Text Solution

    |

  15. Assertion : In interference and diffraction, light energy is redistrib...

    Text Solution

    |

  16. Assertion : Intensity pattern of interference and diffraction are not ...

    Text Solution

    |