Fringe Width

Q. Yellow light is used in a single slit diffraction experiment with slit width of $0.6\text{mm}$. If yellow light is replaced by X- rays, then the observed pattern will reveal

1. That the central maximum is narrower
2. More number of fringes
3. Less number of fringes
4. No diffraction pattern

Q.

A single slit of width 0.20 mm is illuminated with light of wavelength 500 nm. The observing screen is placed 80 cm from the slit. The width of the central bright fringe will be

[AMU (Med.) 2002]

1. 1 mm

2. 2 mm

3. 4 mm

4. 5 mm

Q.

A single slit of width 0.20 mm is illuminated with light of wavelength 500 nm. The observing screen is placed 80 cm from the slit. The width of the central bright fringe will be

[AMU (Med.) 2002]

1. 1 mm

2. 2 mm

3. 4 mm

4. 5 mm

Q. A single slit of width $b$ is illuminated by a coherent monochromatic light of wavelength $\lambda$. If the second and the fourth minima in the diffraction pattern at a distance $1\text{m}$ from the slit are at $3\text{cm}$ and $6\text{cm}$ respectively from the central maximum, what is the width of the central maximum?

1. $1.5\text{cm}$
2. $3.0\text{cm}$
3. $4.5\text{cm}$
4. $6.0\text{cm}$