Abeam of light enters a flat pane of glass with parallel and smooth surfaces at an angle of incidence of 300. the refractive index of the glass is 1.2. the light is refracted when it enters the glass plate and refracted again when it leaves. what is the exiting angle of refraction? answer in degrees but do not enter the unit.

Angle of refraction is calculated by Snell's law

it is given as

now for the first surface we can say

now this is the angle of incidence on the next surface

so we will again apply snell's law

so the final angle of refraction after two refraction will be same as that of angle of incidence.

So its 30 degree.

another example of kinetic energy would be,

kinetic energy   >     moving energy

answer   >   letter choice (c),   a hammer falling off a table.

hope that !                                         : )

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.