10 Questions around this concept.
The angle of incidence at which reflected light is totally polarized for reflection from air to glass (refractive index, n), is
Directions: In each question below are given three statements followed by two conclusions which are numbered as I, and II. You have to take the given statements to be true even if they seem to be at variance with commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follows from the given statements, disregarding commonly known facts.
Mark your answer as –
(A) If only conclusion I follows.
(B) If only conclusion II follows.
(C) If either conclusion I or conclusion II follows.
(D) If neither conclusion I nor conclusion II follows.
(E) If both conclusion I and conclusion II follow.
Statements:
I. Only a few pinki is rama.
II. A few rama is neha.
III. Only a few neha is tina.
Conclusions:
I. All rama being neha is a possibility.
II. All neha being tina is a possibility.
An unpolarized light beam travelling in air is incident on a medium of refractive index 1.73 at Brewster's angle. Then-
Brewster’s law-
Brewster discovered that when a beam of unpolarized light is reflected from a transparent medium (refractive index $=\mu$ ), the reflected light is completely plane polarised at a certain angle of incidence (called the angle of polarisation i.e. ${ }{ }^p$ ).
And also $\mu=\tan \theta_p$.
i.e For $\quad i=\theta_P$
reflected rays will be completely polarised.
For $i<\theta_P$ ori $>\theta_P$
reflected rays will be partially polarised.|
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