Name a real and unreal source of light.

State whether True or False:- An unreal source of light is moon.

State whether True or False:- A real source of light is sun.

Name some animal sources of lipid.

Name four natural sources of air pollution.

In Young's double slit experiment what is the effect of the following operations on interference fringes ? The monochromatic source is replaced by a source of white light.

What causes a green plant exposed to the light on only one side, to bend toward the source of light as it grows

Determine what kind of movement listed below are: The stem and branches grow towards the source of light

You are given four sources of light each one providing a light of single colour - red, blue, green and yellow, Suppose the angle of refraction for a beam of yellow light corresponding to a particular angle of incidence at the interface of two media is 90^(@) . Which of the following statement is correct if the source of yellow light is replaced with other lights without changing the angle of incidence?