Question

Which of the following phenomena of light are involved in the

formation of a rainbow?

(a) Reflection, refraction and dispersion

(b) Refraction, dispersion and total internal reflection

(c) Refraction, dispersion and internal reflection

(d) Dispersion, scattering and total internal reflection


NCERT Class X

Science - Exemplar Problems


Chapter_The Human Eye and

the Colourful World

Answer 1

Answer:

total internat reflection dispersion and scattering makes the rainbow

Answer 2

Refraction, dispersion and total internal reflection are involved in the formation of the rainbow. (Option B)

• The rainbow is formed when the solar rays pass through the rain droplets.

• When the solar rays enter into the rain droplets from the atmospheric air, the density of the medium is changed and the refraction takes place.

• Inside the rain droplet,the total internal reflection takes place.

• And,when the solar rays make their way out from that water droplet , the solar rays are dispersed into seven coloured spectrum.

• In this way,the rainbow is formed.