Diffraction of Light

Light, from a monochromatic source, is made to fall on a single slit of variable width. An experimentalist records the following data for the linear width of the principal maxima on a screen kept at a distance of 1 m from the plane of the slit.
 

Using the observations from this data estimate the value of the wavelength of light used.

In a single slit diffraction experiment, a slit of width ‘d’ is illuminated by red light of wavelength 650 nm. For what value of ‘d’ will

​(i) the first minimum fall at an angle of diffraction of  $30°$ , and

(ii) the first maximum fall at an angle of diffraction of  $30°$ :

In a single slit diffraction experiment, a slit of width $d$ is illuminated by red light of wavelength $650 \mathrm{nm}$. For what value of $d$ will 

​(i) the first minimum fall at an angle of diffraction of  $30°$ and

(ii) the first maximum fall at an angle of diffraction of  $30°$

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

Consider Fraunhoffer diffraction pattern obtained with a single slit illuminated at normal incidence. At the angular position of the first diffraction minimum, the phase difference (in radians) between the wavelets from the opposite edges of the slit is

Consider Fraunhoffer diffraction pattern obtained with a single slit illuminated at normal incidence. At the angular position of the first diffraction minimum, the phase difference (in radians) between the wavelets from the opposite edges of the slit is

A beam of light of wavelength $600 \mathrm{nm}$ from a distance source falls on a single slit $1 \mathrm{mm}$ wide and a resulting diffraction pattern is observed on a screen $2 \mathrm{m}$ away. The distance between the first dark fringes on either side of central bright fringe is

A slit of width $d$ is placed in front of a lens of focal length $0.5 \mathrm{m}$ and is illuminated normally with light of wavelength $5.89\times {10}^{-7} \mathrm{m}$. The first diffraction minima on either side of the central diffraction maximum are separated by $2\times {10}^{-3} \mathrm{m}$. The width $d$ of the slit is_________$m.$

In a single slit diffraction experiment, first minima for ${\mathrm{\lambda }}_1=660 \mathrm{m}$ coincides with first maxima for wavelength ${\mathrm{\lambda }}_2$ then ${\mathrm{\lambda }}_2$ (in $\mathrm{nm}$) will be equal to

For a diffraction from a single slit, the intensity of the central point is

Interference pattern is obtained as the result of interaction of light coming from two same wavefronts from two sources but diffraction pattern is obtained as the result of interaction of light coming from different part of the different wavefront.

Interference fringes are of the same width while diffraction fringes are not of the same width.

In interference pattern, all bright bands are of same intensity while in diffraction pattern all bright bands are not of same intensity. 

For a diffraction from a single slit, the intensity of the central point is

Which is the following colourful patterns is due to diffraction of light?

Fraunhofer lines observed in the solar spectrum are due to

Mention the difference between interference and diffraction.

Discuss the special case of first minima in Fraunfofer's diffraction.

What is diffraction?

Light is diffracted at a single slit. Which of the following graphs best represents how the intensity $I$ of the diffracted light varies with the diffraction angle $\theta$?