Question

10) The sky looks blue because

1. The sky is reflecting the blue light from the ocean

2. The atmospheric particles scatter more of the blue light towards you than

   the other colors

3. The atmospheric particles have absorbed all the other colors

4. Only blue light from the sun reaches Earth

11) Blue, green, red, and magenta light is projected onto a screen. We know that the green and blue light are horizontally polarized, and the red light is vertically polarized. If a student holds a polarizer up to the projector with its transmission axis along the vertical direction, what color will the magenta block appear?

1. Magenta

2. Red

3. Green

4. Blue

5. Black

12) When unpolarized light passes through a polarizing filter,

1. All the light passes through and is now polarized

2. About half the light passes through and remains unpolarized

3. About half the light passes through and is now polarized

4. It is completely absorbed by the filter

Answer 1

10) the sky appears blue because the particles (dust and gases) scatter shorter wavelength in the light spectrum while the longer ones doesn't scatter much. As blue color has short wavelength thus it is prominently scattered.

Correct answer should be (2).

11) a polariser block the light which is polarised perpendicular to it's transmission axis. Mgenta color is made by red and blue color. When magenta color passes through the polariser , the red color which is polarised vertically passes through it but the blue color which is polarised horizontally is blocked by polariser.

Correct answer should be RED.

12) according to malus law when an unpolarized light is passed through a polariser it's intensity becomes half and it is polarised completely along the transmission axis.

Correct option should be (3)