What are the differences in reflection by (i) a plane mirror, (ii) the wall of a building and (iii) a clean glass plate ?

What will be amount of deviation of light ray after reflection from a plane mirror ?

Distinguish between the total internal reflection and reflection from a plane mirror.

What are (i) light year (ii) astronomical unit and (iii) parsec?

A thin glass plate is placed in between a convex mirror of focal length 20cm and a point source. The distance between the glass plate and the mirror is 5cm. The image formed by the reflected rays from the front face of the glass plate and that due to the reflected rays by the convex mirror coincide at the same point. What is the distance of the glass plate from the source? Draw the ray diagram.

What are the end products of (i) dark phase and (ii) light phase ?

The wavelength of light in the visible region is about 390 nm for violet colour, about 550 nm (average wavelength) for yellowgreen colour and about 760 nm for red colour. (a) What are the energies of photons in (eV) at the (i) violet end, (ii) average wavelength, yellow-green colour, and (iii) red end of the visible spectrum? ("Take h "= 6.63xx10^(-34)" J s and 1 eV" = 1.6xx10^(-19)J.) (b) From which of the photosensitive materials with work functions listed in Table 11.1 and using the results of (i), (ii) and (iii) of (a), can you build a photoelectric device that operates with visible light?

State the difference: (i) Cell wall and cell membrane, (ii) Chloroplast and amyloplast, (iii) Starch grains and zymogen granules.

A ray of light incident on a medium at polarising angle.what will be the angle between the reflected and the refracted rays? Or, an unpolarised ray of light is incident on a rectangular glass block at Brewster's angle. What will be the angle between the reflected and the refracted rays?