Answer: Option B. -> False
:
B
The given statement is false. We can also see non-luminous objects when the light reflected by them reaches our eyes.

Answer: Option B. -> False
:
B
Rods enable vision at low light levels. Cones on the other hand enable perception of colour.

Answer: Option A. -> lateral inversion
:
A
For an image formed by aplane mirror, the left part of the object appears on the right side in the image and vice versa. This phenomenon is known as lateral inversion.
An example of lateral inversion by a plane mirror is as shownbelow.

Answer: Option B. -> False
:
B
Reflection of light from a rough surface is called irregular reflection of light for e.g. a rock, sand, rough wooden table,etc. From this kind ofsurface,a ray incident on the surface is scattered at many angles rather than at just one angle.

Answer: Option B. -> False
:
B
Blind persons can read and write byusingthe Braille script.Braille was developed to help visually challenged people read by moving their fingers on impressions made on paper. In Braille, there are definite impressions for all letters which a blind person can feel through his fingertips and recognize .

Answer: Option B. -> Infinite
:
B
If the angle of inclination between two plane mirrors is '$x$' degrees, the number of images formed, '$n$' is given by,
$n=\frac{360}{x}-1$
In case of two parallel plane mirrors, the angle of inclination between them is $0^o$.
Hence, infinite images would be formed as each image acts as an object for the other mirror.

Answer: Option C. -> Chalk powder
:
C
Regular reflection occur at highly smooth surfaces. Any surface that is polished will have a highly smooth surface. Among the options, polished marble floor and polished wooden table have very smooth surfaces. Thus, regular reflection takes place on those surfaces. Also, plane mirror is very smooth. It's probably the smoothest of surfaces. Regular reflection occurs there also.
However, chalk powderforms a rough surface. Any reflection happening there is diffused reflection.

Answer: Option B. -> Dispersion
:
B
Splitting of light into its constituent colours is known asdispersion of light. This happens through multiple refractions where the constituent colours of light deviate at different angles.

Answer: Option B. -> Dispersion
:
D
Irregular reflection takes place when light rays are incident on a rough surface like wall, wood, a piece of wool etc,which are not smooth or polished. So, different portions of the surface reflect the incident light rays in different directions.

Answer: Option B. -> False
:
B
Angle made by the incident ray with the normal to the plane of the mirror is called the angle of incidence.