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A converging beam of rays is incident on...

A converging beam of rays is incident on a diverging thin lens. Having passed through the lens the rays intersect at a point 15cm from the lens. If lens is removed the point where the rays meet will move 5cm closer towards the mounting that holds the lens. The focal length of lens is

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A converging beam of rays is incident on a diverging lens. Having passed through the lens the rays intersect at a point 15 cm from the lens. If the lens is removed, the point where the rays meet, move 5 cm closer to the mounting that holds the lens. Find the focal length of the lens.

A converging beam of rays in incident on a diverging lens. Having passed through the lens the rays intersect at a point 15 cm from the lens. If the lens is removed, the point where the rays meet, move 5 cm closer to the mounting that holds the lens. Find the focal length of the lens.

A converging beam of rays in incident on a diverging lens. Having passed through the lens the rays intersect at a point 15 cm from the lens. If the lens is removed, the point where the rays meet, move 5 cm closer to the mounting that holds the lens. Find the focal length of the lens.

A converging beam of light is incident on a concave lens of focal length 20 cm. In the absence of the lens, the beam converges at a point 10 m behind the lens. Find where the beam will converge/diverge after refraction.

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A converging beam of light is incident on a concave lens. The beam converges behind the lens at 15 cm from its centre, in the absence of the lens. Select the correct alternative

A converging beam of light is incident on a concave lens. The beam converges behind the lens at 15 cm from its centre, in the absence of the lens. Select the correct alternative