Single-Slit Diffraction — Practice Quiz

Question 1

In a single-slit experiment, the angular width of the central maximum doubles if:

Accepted Answer

λ is doubled

Answer

Slit width is doubled

Answer

Screen distance is doubled

Answer

Source intensity is doubled

Question 2

Light of wavelength 500 nm passes through a slit of width 0.5 mm. Width of central maximum on a screen 2 m away:

Accepted Answer

4 mm

Answer

1 mm

Answer

2 mm

Answer

5 mm

Question 3

First-minimum diffraction angle for a single slit of width 0.1 mm illuminated by light of λ = 600 nm:

Accepted Answer

6×10⁻³ rad

Answer

6×10⁻⁴ rad

Answer

1.2×10⁻³ rad

Answer

1.2×10⁻² rad

Question 4

In a single-slit diffraction pattern, the ratio of intensities of the central maximum to the first secondary maximum is approximately:

Accepted Answer

22 : 1

Answer

1 : 1

Answer

100 : 1

Answer

1 : 0.045

Question 5

If the slit width in a single-slit experiment is reduced to half, the angular width of the central maximum:

Accepted Answer

Doubles

Answer

Halves

Answer

Stays the same

Answer

Quadruples