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White light is passed through a double slit and interference pattern is observed on a screen 2.5 m away. The separation between the slits is 0.5 mm. The first violet and red fringes are formed 2.0 mm and 3.5 mm away from the central white fringe. Calculate the wavelengths of the violet and the red light.

A

400 nm, 650 nm

B

400 nm, 700 nm

C

350 nm, 200 nm

D

200 nm, 350 nm

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The correct Answer is:
B
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AAKASH SERIES-WAVE OPTICS-LECTURE SHEET (EXERCISE - I) (INTERFERENCE & YDSE) Level - II (ADVANCED) (straight objective Type Questions)
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  2. A source emitting light of wavelengths 480 nm and 600 nm is used in a ...

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  3. A parallel beam of monochromatic light is used in a Young's double sli...

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  4. In a YDSE, the central beight fringe can be indentified:

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  5. In Young's double slit experiment, the two slits acts as coherent sour...

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  6. In Young's double-slit experment, the frist maxima is observed at a fi...

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  7. In a double-slit experiment, instead of taking slits of equal width, o...

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  8. In a YDSE , if the silts are of unequal widths,

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  9. In an interference arrangement similar to Young's double-slit experime...

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  13. White coherent light (400 nm-700 nm) is sent through the slits of a YD...

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  16. Consider the situation shown in figure. The two slits S1 and S2 placed...

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  17. In a Young's double slit experiment green light is incident on the two...

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  18. A plate of thickness t made of a material of refractive index mu is pl...

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  19. A mica strip and a polysterence strip are fitted on the two slite of ...

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