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In a Young’s double-slit experiment, the...

In a Young’s double-slit experiment, the slits are separated by 0.28 mm and the screen is placed 1.4 m away. The distance between the central bright fringe and the fourth bright fringe is measured to be 1.2 cm. Determine the wavelength of light used in the experiment.

A

4000 Å

B

5000 Å

C

6000 Å

D

7000 Å

Text Solution

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The correct Answer is:
C
For answer see Physics Darpan, Part-2, Section-B, Exercises of Textbook example no. 10.4
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KUMAR PRAKASHAN-WAVE OPTICS-SECTION-D (MULTIPLCE CHOICE QUESTIONS (MCQS)) (MCQS FROM DARPAN BASED ON TEXTBOOK)
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  2. (a) The refractive index of glass is 1.5. What is the speed of light i...

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  3. In a Young’s double-slit experiment, the slits are separated by 0.28 m...

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  4. A beam of light consisting of two wavelengths, 650 nm and 520 nm, is u...

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  5. In a double-slit experiment the angular width of a fringe is found to ...

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  7. Light of wavelength 5000 Å falls on a plane reflecting surface. What a...

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  8. The 6563Å Halpha line emitted by hydrogen in a star is found to be red...

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  9. In double-slit experiment using light of wavelength 600 nm, the angula...

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  10. Two towers on top of two hills are 40 km apart. The line joining them ...

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  11. A parallel beam of light of wavelength 500 nm falls on a narrow slit a...

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  12. To demonstrate the phenomenon of interference, we require two sources ...

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  13. The angle of incidence at which reflected light totally polarised for ...

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  14. The maximum number of possible interference maxima for slit-separation...

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  15. A Young's double slit experiment uses a monochromatic source. The shap...

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  16. If unpolarised light of intensity I(0) is incident on the polarising p...

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  17. On screen there are two bright points at a distance I mm. These points...

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  18. if the intensity of the principal maximum in the single slit Fraunhoff...

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  19. In a Young's double slit experiment the intensity at a point where the...

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  20. A mixture of light consisting of wavelength 590 nm and an unknown wave...

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