While observing the shadow of a stick from morning to evening, some questions arose in Ramya’s mind. What may be those questions?

While observing the shadow of a stick from morning to evening, some questions that may arise to Ramya’s mind are:

(i) Why does shadow change its length?

(ii) Why does shadow stick first decreases till noon then again start increasing after noon?

(iii) How does Sun change its position?

Note: You are requested to write your own thoughts.