Home
Class 12
PHYSICS
A thin convex lens is placed just above ...

A thin convex lens is placed just above an empty an empty vessel of depth 80 cm . The image of a coin kept at the bottom of the vessel is thus formed 20cm above the lens . If now water is poured int he vessel up to a height of 64 cm. what will be the approximate new position of the image . Assume that refractive index of water is 4/3

A

21.33 cm above the lens

B

6 . 67 cm below the lens

C

33 . 67 cm above the lens

D

24 cm above the lens

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • QUESTION PAPER 2020

    WB JEE PREVIOUS YEAR PAPER|Exercise PHYSICS (CATEGORY-II)|1 Videos

  • QUESTION PAPER 2020

    WB JEE PREVIOUS YEAR PAPER|Exercise PHYSICS (CATEGORY-III)|3 Videos

  • QUESTION PAPER 2007

    WB JEE PREVIOUS YEAR PAPER|Exercise PHYSICS|50 Videos

Similar Questions

Explore conceptually related problems

The centre of gravity of a hollow cylinder of mass 200 g is 10 cm above its base. If 500 g of water is poured into the cylinder the water level comes up to a height of 6 cm. What will be the height of the centre of gravity of the cylinder containing water?

An object is placed 20 cm from a convex lens of focal length 10 cm. The image must be-

The height of a vessel is 15 cm . Liquid is poured into the vessel such that the surface of the liquid remains 5 cm below the vessel's top. On seeing from above the depth of the liquid appears to be half. Calculate the refractive index of the liquid.

The height of a vessel is 15 cm . Liquid is poured into the vessel such that the surface of the liquid remains 5 cm below the vessel's top. On seeing from above the depth of the liquid appears to be half. Calculate the refractive index of the liquid.

A source of light is placed at the bottom of a tank filled with water up to the height of 80 cm. Calculate the area at the surface of water through which light rays will be emitted. Refractive index of water = 1.33.

An object is kept at a far off distance in front of a convex lens of focal length 15 cm. State the position of the image.

A man observe a fish at a depth of 6 cm from the surface of water in a pond. To hunt the fish, at what depth will he have to through the spear? Refractive index of water = (4)/(3) .

If in a plano-convex lens, the radius of curvature of the convex surface is 10cm and the focal length of the lens is 30cm, then what is the refractive index of the material of lens ?

A conical pot of internal radius 5 cm and height 24 cm is filled with water . It this water is poured into a right cylindrical pot of radius 10 cm , then what will be the height of water - level into the pot ?

A point object is placed on the axis of a thin convex lens of focal length 0.05 m at a distance of 0.2 m from the lens and its image is formed on the axis. If the object is now made to oscillate along the axis with a small amplitude of A cm, then what is the amplitude of oscillation of the image ? [you many assume, 1/(1+x) = 1-x , where x lt lt 1 ]