Assertion: A famous painting was painted by not using brush strokes in the usual manner, but rather a myriad of small colour dots. In this painting the colour you see at any given place on the painting changes as you move away.
Reason: The angular separation of adjacent dots changes with the distance from the painting.

Options

A. (a) If both the assertion and reason are true and reason explains the assertion assertion.
B. (b) If both assertion and reason are true but reason does not explain the assertion
C. (c) If assertion is true but reason is false.
D. (d) If assertion is false but reason is true.

Answer

A

Explanation

Resolving power `=1.22lambda/d`, where `lambda` is wavelength and d is distance. For the human eye the resolving power or angular separation of objects changes as distance from the object changes. Thus, when we are close to the pointing our eyes can pick out the separate colours of dots. But when we move away from the painting, our eyes blend the dots and we see different colours.