When a compact disc is illuminated by a source of white light, coloured lines are observed. This is due to

In a Young's double slit experiment performed with a source of white light, only black and white fringes are observed.

In a Young's double slit experiment performed with a source of white light, only black and white fringes are observed.

A photoelectric cell is illuminated by a point source of light 1 m away. When the source is shifted to 2 m then

A photoelectric cell is illuminated by a point source of light 1 m away . When the source is shifted to 2 m then

When the light source is moving towards an observer,

When the light source is moving towards an observer,