Ray Optics and ...

There is a small block in the centre C of solid glass sphere of refractive index $$\mu$$. When seen from outside the block will appear to be located :

A ray of light is incident on a surface of glass slab at an angle $$45^o$$. If the lateral shift produced per unit thickness is $$1/\sqrt{3}$$, then the angle of refraction produced is?

A narrow white light beam fails to converge at a point after going through a converging lens. This defect is known as :

A straight rod is partially immersed in water $$(\mu = 1.33)$$. Its submerged portion appears to be inclined at $$45^o$$ with the surface when viewed vertically from air. The actual inclination of the rod is?

There is a small black dot at the centre C of a solid glass sphere of refractive index $$\mu$$. When seen from outside, the dot will appear to be located:

A water drop in air reflects the light rays as

A microscope is focussed on an ink mark on the top of a table. If we place a glass slab of $$3$$cm thick on it, how should the microscope be moved to focus the ink spot again? The refractive index of glass is $$1.5$$.

A ray of light passing through a semicircle block from air is shown below. Consider the given figure and select the correct option which correctly identifies the true (T) and false (F)?
(i) There is no change in the direction of ray at $$P$$ because light ray incident on semicircular block at $$90^{\circ}$$.
(ii) As light rays enters the semicircular block, its frequency remains the same.
(iii) Wavelength of light rays as it enters the block decreases.
(iv) Speed of light as it enters the block increases.

There is a small black dot at the centre $$C$$ of a solid glass sphere of refractive index $$\mu$$. When seen from outside, comment on the location of the dot.

What is the required condition, if the light incident on one face of a prism, does not emerge from the other face?