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# Physics, X

1. An object of 1 cm high produces a real image 1.5 cm high, when placed at a distance of 15 cm from concave mirror .calculate the position of the image?
2. Refractive index of water is 4/3 and that of glass is 3/2with regard to air. What is the refractive index of glass with respect to water?
3. How much time will light take to cross 4mm thick glass pane if refractive index of glass is 3/2?
4. Explain with the help of diagram , why a pencil partly immersed in water appears to be bent at the water surface?
5. Calculate the distance at which an object should be placed in front of a concave mirror of focal length 15cm to obtain an image triple of its size?
6. An object of 0.2 m high is placed at a distance of 0.4m from a concave mirror of radius of curvature 0.3 m. Find the position , nature and size of the image formed?

ASSIGNMENT(To be submitted in a separate file)

Draw  ray diagrams showing the image formation of

1. concave mirror – all positions
2. convex mirror – all positions
3. concave lens – all positions
4. convex lens -all positions

Also mention the position,nature and size of the image formed in each case.