Light Flashcards
1
Q
What is another name for a converging lens?
A
Convex lens
2
Q
Give two precautions that should be taken when measuring the image distance.
A
Measure from the centre of the lens, measure the perpendicular distance, avoid parallax, check zero error in metre rule.
3
Q
Why is it difficult to measure the image distance when the object distance is less than 10cm?
A
The image is virtual, the image on the same side as the object, no image is formed on the screen.
