Describe variation in the speed of sound through various media.

Light is a transverse wave because its components vibrate perpendicular to the direction of propagation. It has an electric and a magnetic property, so it is EM wave which is transverse in nature .

Where as, sound waves are longitudinal waves and the particles of the medium move parallel to the direction that the pulse moves.

So, as sound waves moves parallel in direction of pulse so, it is affected by media , whereas light waves don't need medium to travel as they are em waves and transversal in nature that is perpendicular motion.

Explanation:

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be

magnified images possible images can be real = projected onto a screen