Jatin puts a pencil into a glass container having water and is surprised to see the pencil in a different state.
Draw a ray diagram showing how the eyes saw the pencil.

Jatin puts a pencil into a glass container having water and is surprised to see the pencil in a different state. What change is observed in the appearance of the pencil?

Jatin puts a pencil into a glass container having water and is surprised to see the pencil in a different state. Name the phenomenon responsible for the change.

A student puts his pencil into an empty trough and observes the pencil from the position as indicated in Figure. (i) What change will be observed in the appearance of the pencil when water is poured into the trough? (ii) Name the phenomenon which accounts for the above stated observation. (iii) Complete the diagram showing how the student's eye sees the pencil through water.

Draw a ray diagram to show how a convex lens can be used as a magnifying glass.

A person is unable to see objects distinctly placed within 50 cm from his eyes. (a) Name the defect of vision the person is suffering from and list its two possible causes. (b) Draw ray diagram to show the defect in the above case. (c) Mention the type of lens used by him for the correction of the defect and calculate its power. Assume that the near point for the normal eye is 25 cm. (d) Draw a labelled diagram for the correction of the defect in the above case.

A person cannot see distinctly the book placed nearer than 60 cm from his eyes. (i) Name the defect of vision the person is suffering from. (ii) List two possible causes of this defect. (iii) Draw a ray diagram to show this vision defect. (iv) How can this defect be corrected ? (v) Draw a ray diagram to show the correction of this defect.

Figure shows the section of a semi-circular glass slab having its centre at O. three rays of light A,B and C of the same colour are incident on the slab and strike on the edge XY at the point O. the light ray B suffers refraction along OB'. (a) On the diagram, mark the critical angle by C. (b) The rays enter the slab undeviated. give reason. (c) Draw the path of rays A and C after they strike the edge XY. (d) Name the phenomenon which the rays A and C exhibit.

A candidate in order to study the process of osmosis has taken 3 potato cubes and put them in 3 different beakers containing 3 different solutions. After 24 hours, in the first beaker, the potato cube increased in size, in the second beaker, the potato cube decreased in size and in the third beaker there was no change in the size of the potato cube. The following diagram shows the result of the same experiment : How does a cell wall and a cell membrane differ in their permeability?

A candidate in order to study the process of osmosis has taken 3 potato cubes and put them in 3 different beakers containing 3 different solutions. After 24 hours, in the first beaker, the potato cube increased in size, in the second beaker, the potato cube decreased in size and in the third beaker there was no change in the size of the potato cube. The following diagram shows the result of the same experiment : Write the specific feature of the cell sap of root hairs which helps in absorption of water.