Light Reflectio...

As shown in above figure, a beam of light in air is incident upon the smooth surface of glass $$30^o$$ with glass surface. Calculate the refractive index of the glass if the reflected beam and refracted beam are perpendicular to each other.

An object is placed at 20 cm in front of a concave mirror produces three times magnified real image. What is focal length of the concave mirror?

In above shown figure, an object is kept 20 cm from the concave mirror and formed the real image at the distance of 5 cm from the mirror. Calculate the focal length of the mirror.

If I want an image larger than the object (using a convex lens), where must I place the object and where will the image be formed?

Below is a drawing made by a student that represents a light ray entering a piece of plastic and passing into the plastic. The student drew the original light ray to enter the plastic at a $$60.0$$ degree angle with the normal as pictured.
He was able to look through the plastic and line up a ruler with the original light ray he drew to measure the angle of the light ray in the plastic. This angle is labeled in the drawing. The student used his drawing to determine the index of refraction for the plastic.
What value did he determine?

Which of the following is Snell's law

A ray of light traveling in the air is incident on the plane of a transparent medium. The angle of the incident is 45$$^o$$ and that of refraction is 30$$^o$$. Find the refractive index of the medium.

A concave mirror of focal length 'f' produces an image 'n' times the size of the object. If the image is real then the d distance of the object from the mirror is

A light is travelling from air into a medium. Velocity of light in a medium is reduced to $$0.75$$ times the velocity in air. Assume that angle of incidence '$$i$$' is very small, the deviation of the ray is

Study the given ray diagrams and select the correct statement from the following: