Light bends away from normal when it passes from denser to rarer medium. why?

The everyday is a line perpendicular (forming a 90 degree attitude) to the boundary between the two materials. The bending takes place because mild travels more slowly in a denser medium. an indication of refraction can be conducted at home in a dark room.

Explanation:

science is a systematic and logical approach to discovering how things in the universe work. true to this definition, science aims for measurable results through testing and analysis. science is based on fact, not opinion or preferences. the process of science is designed to challenge ideas through research.

explanation:

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