Question

Which of the following factor(s) is/are considered while measuring time in a sundial?

• A. Speed and direction of the wind.
• B. Length of shadow created by the sundial.
• C. Direction of shadow created by the sundial.
• D. Temperature when the measurement is taken.

Answer 1

Answer: (B), (C)

The correct options are
B Length of shadow created by the sundial.
C Direction of shadow created by the sundial.

Sundial is used to determine the time by the shadow created by the sundial which depends on the orientation of the sun. Hence the length and direction of the shadow are considered to take the measurements.
The image given below shows a sundial.