Question

The image of point P on reflection in a line $l$ is point $P'$

describe the location of the line $l$

Answer 1

$\bf \fbox \red{ \: Answer:-}$

✒Since ' P ' is it own image under the reflection of light under the ' l ' , So, point p is an invariant point.

✒Hence, the position of P remains unaltered.

$\underline{\rule{220pt}{2.5pt}}$

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$\begin{array}{ |c|c|} \ {}\bf Object & \bf {Refractive\:Index} \\\dfrac{\qquad\qquad\qquad\qquad}{}&\dfrac{\qquad\qquad\qquad\qquad}{} \\\sf Air & \sf 1.0003 \\ &\\\sf Ice & 1.31 \\ & \\ \sf Water & 1.33 \\&\\ \sf Alcohol & 1.36 \\&\\ \sf Kerosene & 1.44 \\&\\ \sf Liquefied\:  Quartz & 1.46 \\&\\ \sf Torpene-Tyne\:oil & 1.47 \\&\\ \sf Benzene & 1.50 \\&\\ \sf Crown\:Glass & 1.52 \\&\\ \sf Canada\:Balsum & 1.53 \\&\\ \sf Rock\:Salt & 1.54 \\&\\ \sf Carbon\:Di sulphate  & 1.63 \\&\\ \sf Dark\:Flint\:Glass & 1.65 \\&\\ \sf Ruby & 1.71 \\&\\ \sf Diamond & 2.42    \\ \ {}\end{array}$

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Answer 2

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