A ray of light after reflection from a mirror is known as:

1. reflected ray
2. normal
3. incident ray
4. refracted ray

The speed of light is maximum in:

1. glass
2. water
3. air
4. wood

The primary colours are:

1. Red, blue and yellow
2. Magenta, yellow and cyan
3. Red, Blue and cyan
4. Blue, green and red

Assertion (A): Mixing a red, green and blue light gives white light.

Reason (R): Red, green and blue are secondary colours.

1. Both A and R are true and R is the correct explanation of A
2. Both A and R are true and R is not the correct explanation of A
3. A is true but R is false
4. A is false but R is true