Alternative B
Question 2B
(b) (i) State two differences between a real image and a virtual image.
(ii) Define the focal length of a converging lens.
Observation
The expected response:
(b)(i)
Real image |
Virtual image |
Formed by actual intersection of rays |
Formed by apparent intersection of rays |
Can be formed on a screen |
Cannot be formed on a screen |
Inverted |
Erect |
(ii) Focal length of a converging lens is the distance between the optical centre and the principal focus of the lens.