What is the angle of refraction when a ray of light passes from ethanol to air if the incident angle is 34°? the refractive index of ethanol is 1.36 and of air is 1.00.

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

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.