Question

A light wave is like a sound wave in that both are longitudinal waves. are means of transmitting energy are transverse waves require a material medium for propagation. have the same velocity in air A 60° prism has a refractive index of 1.64 for blue light and 1.61 for red light. Calculate the difference in the angle of emergence from the opposite face of the prism for a beam of red light and a beam of blue light that are both incident at an angle of 609. 0.4° 0.0° 1.3 3.9° O 2.7°

Answer 1

Sound is the longitudinal wave whereas light waves are transverse in nature, sound wave need material medium for its propagation but light waves don't require any material medium, there is a huge difference between the speed of light waves and sound waves speed of light is about 3×10⁸ m/s whereas speed of sound in air is about 344 m/s.

Hence in given options only 2nd option is correct i.e., both are the means of transmitting energy.

According to Chegg guidelines, we need to answer only 1st question if no particular question number mentioned to solve, but let me give you hint for the second question-

The angle between the the emergent Ray's of any two colours is called 'angular dispersion' between those colours-

Angular dispersion = (n_{​​​​​​B}​​​​​ - n_{​​​​​​R})A

Where, n_​B is the refractive index for blue light

n_{​​​​​​A} is the refractive index for red light

A is the Angle of the Prism.