Why does white light create a rainbow when passed through a prism?

Explanation:

Any light when it passes through a medium of different density will change its direction. As the light passes through a material of different density the speed of light changes which causes the light to bend.

White light is the mixture of all the colors of the visible electromagnetic spectrum. When it passes through a prism each wavelength of the visible spectrum gets bent. This causes the white light to split into the rainbow which we see.

increase masses, decrease separation

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards