Fill half a bowl with water. Now place the mirror strip in the bowl as shown in the picture. Now keep it facing the sun so that the sun rays fall on the mirror strip. The light reflected by the mirror should now reflect on a white wall.

What can you see on the wall?

Important Questions on Light

EASY

Science>Physics>Light>Sunlight : White or Coloured

The splitting of white light into

7

colours is called

MEDIUM

Science>Physics>Light>Sunlight : White or Coloured

What is dispersion of light? Will there be dispersion of white light within a glass slab after refraction when white light is incident on the glass slab at an angle of $45^{\circ}$ ?

EASY

Science>Physics>Light>Sunlight : White or Coloured

Write the material that you used to find out the value of refractive index of a prism. What is the necessity of the graph in this experiment?

EASY

Science>Physics>Light>Sunlight : White or Coloured

The danger signals installed at the top of tall buildings are red. These can be easily seen from a distance because among all other colours, the red light

EASY

Science>Physics>Light>Sunlight : White or Coloured

In the given figure, what is the angle of prism?

Question Image

EASY

Science>Physics>Light>Sunlight : White or Coloured

The coloured substances which are used as a paint are known as pigments. In order to obtain various pigments, the subtractive method is used for mixing the pigments. Which of the following colour is not absorbed by yellow and blue pigments?

HARD

Science>Physics>Light>Sunlight : White or Coloured

What is the reason for the blue colour of the sky? How do you appreciate the role of molecules in the atmosphere in this regard?

EASY

Science>Physics>Light>Sunlight : White or Coloured

When white light passes through the prism, colour which deviates the least is:

MEDIUM

Science>Physics>Light>Sunlight : White or Coloured

What happens if dispersion and scattering of light do not occur?

EASY

Science>Physics>Light>Sunlight : White or Coloured

Explain the formation of rainbow.