00:01
So, in this question we have said that this is a light source from this source a monochromatic light is falling on a two flat glass plates after reflecting by this mirror.
00:16
So, this is a partially reflecting mirror in it will do reflection and also refraction then the light from the source falls on this mirror first then it falls on a wedge shaped glasses.
00:31
So, wedge shaped means one will be kept flat and the other will be kept slightly at an angle theta changing here.
00:40
So, now these two are the glass plates then the reflected light from here falls on this glass plates then again gets which goes inside here then again gets reflected or refracted.
01:00
So, then after they partially they will get reflected again they will get refracted and travels here and it forms here a pattern of dark and bright fingers in the screen like this.
01:21
Hence now the question we are asked about that why we are receiving this pattern.
01:28
So, in a part of the question we are asked why we receive this pattern because the light falling on the wedge means with the wedge is kept at an angle theta they will be having a some difference between them hence light will be travelling at different distances hence light falling on wedge undergo difference in distances due to the angle theta formed here.
01:59
So, this light falling on wedge the wedge will be usually shaped like a air flame forming.
02:06
So, in between air will be filled here.
02:10
So, here air will be filled hence they are moving to air medium out and the air medium inside the wedge then again then the reflected rays from the wedge are not parallel means they will be travelling different distances inside the wedge hence they cannot reflect back at the same time hence they will not be parallel.
02:41
As they are not parallel they will undergo constructive and destructive interference.
02:51
Constructive interference is when the wave rays coming out of the wedge will undergo the interference means they will interfere with one another during that interference if they produce the bright fringe then it is called the constructive interference otherwise if it produces the dark fringe it is called the destructive interference...