State the laws of reflection

What is intensity division?

Obtain the equation for of microscope.

Write the conditions for nature of objects and images.

What is principal axis of the mirror?

What is focus (or) focal point of a mirror?

Write the difference between paraxial rays and marginal rays.

Define refractive index of a medium.

What is thin lens?

An object is placed at the principal focus of a convex lens. Determine the position of the image making use of the lens equation.

Use the lens equation to deduce algebraically the following:
"An object placed within the focus of a convex lens produces a virtual and enlarged image".

The image of a candle is formed by a convex lens on a screen. The lower half of the lens is painted black to make it completely opaque. Draw the ray diagram to show the image formation. How will this image be different from the one obtained when the lens is not painted black?

A thin biconvex lens is made up of a glass of refractive index 1.5. The two surfaces have equal radii of curvature of 30 cm each. One of its surfaces is made reflecting by silvering it from outside. (a) What is the focal length and power of this silvered lens? (b) Where should an object be placed in front of this lens so that the image is formed on the object itself?

A beam of light consisting of red, green and blue is incident on a right-angled prism as shown in figure. The refractive index of the material of the prism for the above red, green and blue colours are 1.39, 1.44 and 1.47 respectively. What are the colours suffer total internal reflection?

Obtain the lens maker’s formula for a lens of refractive index n₂ which is separating two media of refractive indices n₁ and n₃ on the left and right respectively.