A converging beam of light is incident on a concave lens of focal length 20...
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Physics
A converging beam of light is incident on a concave lens of focal length 20 cm In the absence of lens the beam converges at a point 10 cm behind the lens At what point the beam will converge diverge after refraction Converges to 5 cm behind the lens Diverges to 10 cm behind the lens Converges to 6 cm behind the lens Converges to 20 cm behind the lens
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