Rajesh Singh, Indu Gupta and, Sikha Sharma Solutions for Chapter: The Human Eye and the Colourful World, Exercise 1: Multiple Choice Questions (MCQs)

A prism $ABC$ (with $BC$ as base) is placed in different orientations. A narrow beam of white light is incident on the prism as shown in figure. In which of the following cases, after dispersion, the third colour from the top corresponds to the colour of the sky?

Which of the following statements is correct regarding the propagation of light of different colour of white light in air?

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

Which of the following phenomena contributes significantly to the reddish appearance of the sun at sunrise or sunset?

The bluish colour of water in deep sea is due to 

When light rays enter the eye, most of the refraction occurs at the 

The focal length of the eye lens increases when eye muscles

Which of the following statements is correct?