Define power of a lens. What is its unit? One student uses a lens of focal length and another of What is the nature of the lens and its power used by each of them?
Note: To make the question academically more meaningful use lens in the last sentence instead of the word length.
Important Questions on Light – Reflection and Refraction
A student focussed the image of a candle flame on a white screen using a convex lens. He noted down the position of the candle, screen and the lens as under
position of candle
position of convex lens
position of the screen
What is the focal length of the convex lens?
A student focussed the image of a candle flame on a white screen using a convex lens. He noted down the position of the candle, screen and the lens as under
position of candle
position of convex lens
position of the screen
Where will the image be formed, if he shifts the candle towards the lens at a position of ?
A student focussed the image of a candle flame on a white screen using a convex lens. He noted down the position of the candle, screen and the lens as under
position of candle
position of convex lens
position of the screen
What will be the nature of the image formed, if he further shifts the candle towards the lens?
A student focussed the image of a candle flame on a white screen using a convex lens. He noted down the position of the candle, screen and the lens as under
position of candle
position of convex lens
position of the screen
Draw a ray diagram to show the formation of the image in case as said above.
