In a single slit diffraction pattern,the intensity and width of the fringes are:

In a diffraction pattern due to a single slit of width $a$,the first minimum is observed at an angle $30^{\circ}$ when light of wavelength $5000 \; \mathring{A}$ is incident on the slit. The first secondary maximum is observed at an angle of

Which scientist discovered the phenomenon of diffraction of light?

In a single slit diffraction experiment,the width of the slit is doubled. Which one of the following statements is correct?

Why is the diffraction of sound waves more evident in daily experience than that of light waves?

In a single slit diffraction pattern,the distance between the plane of the slit and the screen is $1.3 \ m$. The width of the slit is $0.65 \ mm$ and the second maximum is formed at a distance of $2.6 \ mm$ from the center of the screen. The wavelength of light used is: (in $Å$)