Question: A convex lens is put 10 cm from a light source and it makes a sharp image on a screen, kept 10 cm from the

A convex lens is put 10 cm from a light source and it makes a sharp image on a screen, kept 10 cm from the lens. Now a glass block (refractive index 1.5) of 1.5 cm thickness is placed in contact with the light source. To get the sharp image again, the screen is shifted by a distance d. Then d is

(a) 0.55 cm towards the lens

(b) 0

(d) 0.55 cm away from the lens

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