Ray Optics and ...

The ratio of real depth to apparent depth is called the the

If the focal length of a magnifying glass is 2.5 cm, it can magnify an object: 

A number of thin prism of prism angle $$A$$ and refractive index $$\mu$$ are arranged on periphery of circle such that any light ray entering from one prism move along a regular polygon

A glass prism of refractive index $$1.5$$ is immersed in water $$(\mu=4/3)$$. Light beam incident normally on the face $$AB$$ is totally reflected to reach the face $$BC$$ if

Two equilateral prisms are arranged as shown in figure such that a ray of white light is incident at point X The ray of light which emerges out of the prism Q

A student sees the top edge and the bottom centre C of a pool simultaneously from an angle $$\theta $$ above the horizontal as shown in the figure. The refractive index of water which fills up to the top edge of the pool is $$4/3$$. If $$h/x = 7/4$$ then $$cos\theta $$ is: 

A ray of light passes through a rectangular slab of thickness $$t$$. The variation of lateral shift($$\delta$$) with angle of incidence (i) is

Four convex lenses A B, C and D have focal lengths of 5 cm, 5 m, 50 cm and 15 cm respectively.Which one would you choose as a magnifying glass?

Which of the following does not represent correct refraction?

When viewed vertically a fish appears to be 4 meter below the surface of the lake. If the index of refraction of water is 1.33, then the true dept of the fish is