Question

PLEASE DO THIS❄ I'll give you 20+ points for this!❄

Answer 1

We know that observer observes object "o" kept in the denser medium from the three positions: A,B,C.

For finding the apparent depth we use formula:-

$\boxed{ \orange {Apparent \: depth = \frac{Real \: depth}{Refractive \: index}}}$

_____________________________________________________________________

________________________________________________________________________________

(a) From which position after viewing apparent depth is more?

$\purple{\bf {\Large{\underline{\underline{Answer:-}}}}}$

After viewing from position "C"apparent depth is more.

$\blue{\small{\tt{Real \: depth \: is \: directly \: \: proportional \: to \:Apparent \: depth.}}}$

In first case the apparent depth becomes equal to real depth because the observer is observing perpendicularly from point "A".

Apparent depth:-

$\green{ \tt{ \boxed{ \therefore{OC > OB > OA \: or \: OA < OB < OC}}}}$

_____________________________________________________________________

(b)What is the effect on apparent depth for oblique viewing when refractive index of the medium is increased?

$\purple{\bf{\Large{\underline{\underline{Answer:-}}}}}$

When the refractive index of the medium increases, the apparent depth decreases. Apparent depth is inversely proportional to refractive index.

$\green{Apparent \: depth \: is \: proportional \: to\:{ \frac{1}{Refractive \: index}}}$

_____________________________________________________________________

________________________________________________________________________________

$\red{\sf{Additional\: \:Information:-}}$

• When a light rays travels obliquely from one transparent medium to another transparent medium, it bends from its original path at the boundary of separation of the two media. So this is known as refraction of light.

• A medium in which light rays travel faster is called optically rarer medium, e.g:- Air.

• A medium in which light rays travels slower is called optically denser medium, e.g:- Water.