Two slits are separated by 2.00 ×10 – 5 m. They are illuminated by lightof wavel

Question

Two slits are separated by 2.00 ×10–5 m. They are illuminated by lightof wavelength 5.60 × 10-7 m. If the distance fromthe slits to the screen is 6.00 m, what is the separation betweenthe central bright fringe and the third dark fringe?

a. 0.070 m
b. 0.421 m
c. 0.168 m
d. 0.224 m
e. 0.084 m Two slits are separated by 2.00 ×10–5 m. They are illuminated by lightof wavelength 5.60 × 10-7 m. If the distance fromthe slits to the screen is 6.00 m, what is the separation betweenthe central bright fringe and the third dark fringe? 0.070 m 0.421 m 0.168 m 0.224 m 0.084 m

Explanation / Answer

Two slits separation d = 2.00 ×10–5 m
wavelength = 5.60 × 10-7 m the distance from the slits to the screen D = 6.00 m the separation between the central bright fringe and thethird dark fringe y = 5 where = fringe width = D / d So, y = 5D / d           = 84 *10 ^ -2 m           = 0.84m            

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