Physics - Geometrical Optics Question with Solution | TestHub

PhysicsGeometrical OpticsRefraction at plane surfaceEasy2 minPYQ_2020

PhysicsEasysingle choice

The $x - z$ plane separates two media $A$ and $B$ of refractive indices $n_{1} = 1.5$ and $n_{2} = 2 . A$ ray of light travels from $A$ to $B$ . Its directions in the two media are given by unit vectors ${\vec{µ}}_{1} = a \hat{i} + b \hat{j} {, \vec{µ}}_{2}, = c \hat{i} + d \hat{j},$ then -

Options:

Answer:

Solution:

$n_{1} s i n i = n_{2} s i n r$

$1.5 ({\vec{μ}}_{1} \times \hat{j}) = 2 ({\vec{μ}}_{2} \times \hat{j})$

$1.5 [(a \hat{i} + b \hat{j} \times \hat{j}] = 2 [(c \hat{i} + d \hat{j}) \times \hat{j}]$

$1.5 a \hat{k} = 2 c \hat{k}$

$\frac{a}{c} = \frac{2}{1.5} = \frac{4}{3}$

Stream:JEESubject:PhysicsTopic:Geometrical OpticsSubtopic:Refraction at plane surface

⏱ 2mℹ️ Source: PYQ_2020

Doubts & Discussion

Loading discussions...