The wavelength and velocity of a set of plane waves travelling in a medium are 60cm and 320cm/s, respectively. It meets a plane refracting surface at an angle of incidence of 60^0. It's velocity after refraction is 280cm/s. Calculate the wavelength of the waves in the second medium and also the angle of refraction.

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

in this image, you can see solar radiation going through ocean water.

no image, but probably absorption

terd muffin is the correct answer

im sorry i dont know