Which of the following statements are correct about single slit diffraction?

A. Width of central maxima increases with increasing wavelength keeping slit width constant.
B. Width of central maxima increases with decreasing wavelength keeping slit width constant.
C. Width of central maxima increases with decrease in slit width at constant wavelength.
D. Width of central maxima increases with increase in slit width at constant wavelength.
E. Brightness of central maxima increases for decrease in wavelength at constant slit width.

Question

Which of the following statements are correct about single slit diffraction?

A. Width of central maxima increases with increasing wavelength keeping slit width constant.
B. Width of central maxima increases with decreasing wavelength keeping slit width constant.
C. Width of central maxima increases with decrease in slit width at constant wavelength.
D. Width of central maxima increases with increase in slit width at constant wavelength.
E. Brightness of central maxima increases for decrease in wavelength at constant slit width.

Shiksha Nation · Accepted Answer

Solution:
Width of central maxima:
Width &prop; &lambda;/a
where:

&lambda; = wavelength
a = slit width

Therefore:

A is correct
B is incorrect
C is correct
D is incorrect
E is incorrect

Answer: A and C are correct.

Verified Answer