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Home
Class 12
PHYSICS
If white light is used instead of sodium...

If white light is used instead of sodium light in the Young's experiment......

A

all fringes will appear dark.

B

all bright fringes will appear white

C

only the central fringe will be white, all other will look colourful.

D

none of these

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Text Solution

Verified by Experts

The correct Answer is:
C
Using `beta=(lambda)/(d)`
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Red light is generally used to observe diffraction pattern from single slit. If blue light is used instead of red light, then diffraction pattern.

White light is used to illuminate the two slits in a Young's double slit experiment. The separation between the slits is b and the screen is at a distance d (gt gtb) from the slits At a point on the screen directly in front of one of the slits, certain wavelengths are missing some of these missing wavelengths are

Knowledge Check

  • When monochromatic red light is used instead of blue light in a convex lens, its focal length will ......

    A
    not depend on colour in light.
    B
    increase
    C
    decrease
    D
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  • If yellow light emitted by sodium lamp in Young's double slit experiment is replaced by monochromatic blue value of light of the same intensity then....

    A
    fringe width will decrease
    B
    fringe width will increase.
    C
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    D
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  • In Young's experiment distance between twe slits is 0.28 mm and distance between the slit and the screen is 1.4 m. If distance between central bright fringe and third bright fringe is 0.9 cm wavelength of light used in Young's experiment is .....

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    `6000Å`
    B
    `5000Å`
    C
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    D
    `3000Å`

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    KUMAR PRAKASHAN-WAVE OPTICS-SECTION-D (MULTIPLCE CHOICE QUESTIONS (MCQS)) (MCQS FROM DARPAN BASED ON TEXTBOOK)
    1. If path difference between two wave superposing at a point is (3)/(2) ...

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    2. In Young's experiment distance between two consecutive dark fringes is...

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    3. If white light is used instead of sodium light in the Young's experime...

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    4. only the central fringe will be white, all other will look colourful. ...

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    5. In Young's experiment if mica disc of thickness t and refractive index...

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    6. A glass plate of thickness d and refractiv index n is placed on the pa...

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    7. In the Young's double slit experiment, the slits are 0.4 cm apart and ...

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    8. 92 fringes are obtained in the definite distance R on screen by Young'...

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    9. In Young's slit experiment, if the distance between two slits is halve...

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    10. In the Young's experiment, when a plate of thickness lambda and refrac...

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    11. In a Young's experiment, the width of one of the two slits is double t...

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    12. Young's double slit experiment is made in a liquid. The 10th bright fr...

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    13. If the two slits in Young's double slit experiment have width ratio 1:...

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    14. The phenomena of light passes through sleet and bends at edges of slit...

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