Using monochromatic light of wavelength , an experimentalist sets up the Young’s double slit experiment in three ways as shown.
If she observes that , the wavelength of light used is :
520 nm
540 nm
560 nm
580 nm
As we learnt in
Displacement of fringe -
Shift in position of fringes
- wherein
If sheet is placed in front of one of slit.
n = 2
Now
Correct option is 2.
Option 1)
520 nm
This is an incorrect option.
Option 2)
540 nm
This is the correct option.
Option 3)
560 nm
This is an incorrect option.
Option 4)
580 nm
This is an incorrect option.
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