Fraunhofer Diffraction

In a single slit diffraction experiment , a slit of width $\mathrm{d}$ is illuminated by red light of wavelength $650 \mathrm{nm}$. For what value of $\mathrm{d}$ will the ${\mathrm{I}}^{\mathrm{st}}$ maximum fall at an angle of diffraction of ${30}^{\mathrm{o}}$?

The intensity of secondary maxima less than the central bright band in diffraction pattern.

Why is the intensity of secondary maxima less than the central bright band in diffraction pattern?

A single slit Fraunhoffer diffraction pattern is formed with white light. For what wavelength of light the $3^{\mathrm{rd}}$ secondary maximum in the diffraction pattern concedes with the $2^{\mathrm{nd}}$ secondary maximum in the pattern for red light of wavelength $6500 \stackrel{\mathrm{o}}{\mathrm{A}}$?

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

A beam of light of wavelength $600 \mathrm{nm}$ From a distant source fall on a single slit $1 \mathrm{mm}$ Wide and the resulting diffraction pattern is observed on the screen $2 \mathrm{m}$ Away the distance between the first dark fringes on either side of the central bright fringe is;

Fraunhofer lines observed in the solar spectrum are due to

Consider a Fraunhofer diffraction pattern due to circular aperture. In this case the diffraction pattern obtained at $150 \mathrm{cm}$ from lens. If the wavelength of light is $6000 \mathrm{Å}$ and diameter of aperture is $0.2 \mathrm{mm},$ what is the separation between central disc and first secondary minimum?

The condition for observing Fraunhofer diffraction from a single slit is that the light wavefront incident on the slit should be :-

Consider fraunhofer 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 wavelengths from the opposite edges of the slit is

A plane wavefront of wavelength $\lambda$ is incident on a single slit of width a. The angular width of principal maximum is

The angular size of the central maxima due to a single slit diffraction is (a $\to$ slit width)

A point source of light moves in a straight line parallel to a plane table. Consider a small portion of the table directly below the line of movement of the source. The illuminance at this portion varies with this distance $r$ from the source as

An electric bulb illuminates a plane surface. The intensity of illumination on the surface at a point 2 m away from the bulb $5\times {10}^{-4}$phot (lumen$\mathrm{c}{\mathrm{m}}^{-2}$). The line joining the bulb to the point makes an angle of $60°$ with the normal to the surface. The intensity of the bulb in candela (candle power) is

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

In Fraunhofer diffraction experiment, L is the distance between screen and the obstacle, b is the size of obstacle and $\lambda$. is wavelength of incident light. The general condition for the applicability of Fraunhofer diffraction is

In Fraunhofer diffraction experiment, $L$ is the distance between screen and the obstacle, $b$ is the size of obstacle and $\lambda$ is wavelength of incident light. The general condition for the applicability of Fraunhofer diffraction is

If ${\mathit{\text{I}}}_0$ is the intensity of the principle maximum in the single slit diffraction pattern, then what will be its intensity when the slit width is doubled?