Two identical thin watch glasses are joined together with air inside.

1.	Two identical thin watch glasses are joined together with air inside. The surface B is silvered. A sharp image of object placed on optic axis at 20cm from the lens is formed at distance 10cm from lens. Find the distance of the sharp image from the lens when the space between the glasses is filled with water.
Answer» Answer: Two identical thin watch glasses are joined together with air inside. The surface B is SILVERED. A sharp image of object placed on optic axis at 20CM from the LENS is formed at distance 10cm from lens. Find the distance of the sharp image from the lens when the SPACE between the glasses is FILLED with answer is 12 cm

Two identical thin watch glasses are joined together with air inside. The surface B is silvered. A sharp image of object placed on optic axis at 20cm from the lens is formed at distance 10cm from lens. Find the distance of the sharp image from the lens when the space between the glasses is filled with water.

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Two identical thin watch glasses are joined together with air inside. The surface B is SILVERED. A sharp image of object placed on optic axis at 20CM from the LENS is formed at distance 10cm from lens. Find the distance of the sharp image from the lens when the SPACE between the glasses is FILLED with answer is 12 cm

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