Question

Four students A, B, C and D performed the experiment
to determine the focal length of a concave mirror by
obtaining the image of a distant tree on a screen. They
measured the distances between the screen and the
mirror as shown in the diagrams given below:
(A)
The correct way to measure accurate focal length of
the mirror is:​

Answer 1

Answer:

id 388 299 4142

Pas 123456

Answer 2

Answer:

bla bla bla bla bla bla bla