Question

How does the size of image formed by a convex lens vary with the distance of the object from the lens?
What are the factors that determine the speed of a moving object? Write a mathematical equation to show the relation between them.

Answer 1

1. When ojects moves towards optical center the images formed moves away from optical center.
Whereas, when it is placed between F an O then image formed is behind object not far away.

2. Distance and time required to cover it

3. Speed = distance/time

Answer 2

☆size of a image formed by a convex lens is;
when object moves towards optical centre it's image moves away
••☆in case when object is beyond 2F image is formed between F and 2F in other side of lens
•☆•when object is between F and 2F image is formed beyond 2F in other side of lens
☆•when object is between optical centre and focus image is formed in same side which is magnified


☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆
factors in which speed depends;
•
•weight of body

•gravity
•force
•friction
•

also on distance and time
speed=dust./ time