Question

Which of the following is/are not true about sundials?

• A. They works based on the position of the Sun.
• B. They are not very accurate but fairly correct.
• C. They have more accuracy at night.
• D. The accuracy of sundial is slightly better on cloudy days.

Answer 1

Answer: (C), (D)

The correct options are
C

They have more accuracy at night.

D

The accuracy of sundial is slightly better on cloudy days.

Sundials work entirely on the basis of the position of the Sun at a particular time of the day. If the sun is not visible or the sunrays are blocked by clouds, time cannot be read using a sundial. They are not very accurate but it gives a fair idea of what the time could be. The accuracy decreases with decrease in sunlight.