The phenomenon that explains why light waves do not travel in a straight line is known as .......

Assertion: The clouds in the sky generally appear to be whitish.
Reason: Diffraction due to clouds is efficient in equal measure at all wavelengths.

"The person standing behind the open door inside the room can hear the voice of the person standing on the other side of the door but they cannot see each other". Give an experiment based on the diffraction for this statement.

$A$ parallel beam of monochromatic light falls normally on a single narrow slit. The angular width of the central maximum in the resulting diffraction pattern

Light appears to travel in straight lines since

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: