In a single-slit diffraction pattern,if the source of light is replaced by a source of shorter wavelength,the width of the central maximum will:

$A$ linear aperture whose width is $0.02\, cm$ is placed immediately in front of a lens of focal length $60\, cm.$ The aperture is illuminated normally by a parallel beam of wavelength $5 \times 10^{-5}\, cm.$ The distance of the first dark band of the diffraction pattern from the centre of the screen is .....$cm$

Ray optics fails when

$A$ diffraction pattern is obtained by using a beam of red light. If the red light is replaced by blue light,then:

If the width of the slit is $a$,then the value of the first secondary maximum in a single slit diffraction pattern is given by:

Radio waves diffract around buildings,although light waves do not. The reason is that radio waves