Rajesh Singh, Indu Gupta and, Sikha Sharma Solutions for Chapter: Light – Reflection and Refraction, Exercise 2: Short Answer Type Questions

How is the refractive index of a medium related to the speed of light? Obtain an expression for refractive index of a medium with respect to another in terms of speed of light in these two media?

Refractive index of diamond with respect to glass is $1.6$ and absolute refractive index of glass is $1.5.$ Find out the absolute refractive index of diamond.

A convex lens of focal length $20 \mathrm{c} \mathrm{m}$ can produce a magnified virtual as well as real image. Is this a correct statement? If yes, where shall the object be placed in each case for obtaining these images?

Sudha finds out that the sharp image of the window pane of her science laboratory is formed at a distance of $15 \mathrm{cm}$ from the lens. She now tries to focus the building visible to her outside the window instead of the window pane without disturbing the lens. In which direction will she move the screen to obtain a sharp image of the building? What is the approximate focal length of this lens?

How are power and focal length of a lens related? You are provided with two lenses of focal length $20 \mathrm{cm}$ and $40 \mathrm{cm},$ respectively. Which lens will you use to obtain more convergent light?

Under what condition in an arrangement of two plane mirrors, incident ray and reflected ray will always be parallel to each other, whatever may be angle of incidence. Show the same with the help of diagram.

Draw a ray diagram showing the path of rays of light when it enters with oblique incidence from air into water;

Draw a ray diagram showing the path of rays of light when it enters with oblique incidence from water into air.