- At what distance from a convex lens should an object be placed on the axis so as to form a real image of the same size? Illustrate your answer with a ray diagram.
- Under what conditions does a concave lens form a real image?
- Does the focal length of a lens change if it is immersed in water? Will it increase or decrease?
- Draw the ray diagram showing the formation of a virtual image by a convex lens.
- Can a concave lens form a real image? Give the condition.
- Does the focal length of a lens change when immersed in water? Will it increase or decrease?
- A lens made of glass is immersed into water. Will its power increase or decrease?
- Draw the ray diagram showing the formation of real image by a concave lens.
- If a converging lens and a diverging lens having the same focal length be in contact, how will the combination of lenses behave?
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