A concave mirror has radius of curvature of 40 cm. It is at the bottom of a glass that has water filled up to 5 cm (see figure). If a small particle is floating on the surface of water, its image as seen, from directly above the glass, is at a distance d from the surface of water. The value of d is close to:(Refractive index of water = 1.33)

A concave mirror has radius of curvature of 40 cm. It is at the bottom

1.	A concave mirror has radius of curvature of 40 cm. It is at the bottom of a glass that has water filled up to 5 cm (see figure). If a small particle is floating on the surface of water, its image as seen, from directly above the glass, is at a distance d from the surface of water. The value of d is close to:(Refractive index of water = 1.33)
A.	6.7 cm
B.	13.4 cm
C.	8.8 cm
D.	11.7 cm
Answer» D. 11.7 cm

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