Question

The absolute refraclive index of water
is 4/3. What is the speed of light
in water.​

Answer 1

2)In the case of a concave mirror, show the path of the reflected ray when

the incident ray of light

A) is parallel to the principle axis of the mirror

B) Passes through the focus of the mirror

C) Passes through the center of currature of the mirror

Answer 2

$\LARGE{\color{brown}{\textsf{\textbf{ αnѕwєr }}}}$

• Using this Formula

$\boxed{ \sf \red{ Refractive \: index \: of \: water = \large \frac{Speed \: of \: light \: in \: vacuum}{speed \: of \: light \: in \: water} }}$

$\dashrightarrow \sf\frac{4}{3} = \frac{3 \times {10}^{8} }{x} \\ \\ \sf \dashrightarrow x = 2.25 \times {10}^{8} m/s$

speed of light in water 2.25 × 10^8 m/s.