The focal lengths of a thin convergent lens are 0.20m and 0.21m for voilet and red lights, respectively, An object is placed at a distance of 0.15m. Calculate the chromatic aberration in the image.
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An eye-piece consists of a concave lens of focal length 2f and a convex lens of focal length 3f separted by a distance `(f)/(2)`. They are of the same
Correct Answer - Free from chromatic aberration but not spherical, yes
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The focal lengths of a thin convergent lens are 0.5m and 0.484m for red and blue rays, respectively. Find the chromatic aberration and dispersive powe
Correct Answer - 0.016m, 0.0325
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An object is placed `12 cm` to the left of a diverging lens of focal length `-6.0 cm.` A converging lens with a focal length of `12.0 cm` is placed at
Correct Answer - 8 cm
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The focal lengths of the objective and the eye piece of a compound microscope are 1cm and 5cm respectively. An object placed at a distance of `1:1` cm
Correct Answer - (i) 16 cm, 50 cm; (ii) 15.17 cm, - 60
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An object is placed 20 cm to the left of a convex lens of focal length 10 cm. If a concave mirror of focal length 5cm is placed 30 cm to the right of
Correct Answer - The image coincides with the object
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The focal lengths of the objective and eye-piece of a compound microscope are 1 cm and 5 cm, respectively. An object is placed 11 mm from the objectiv
Correct Answer - `66,15.1 cm`
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A convergent lens with a focal length of f = 10 cm is cut into two halves that are then moved apart to a distance of d =0.5 mm (a double lens). Find t
Correct Answer - [0.1 mm]
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A concave lens focal length 10 cm is placed on the axis of concave mirror of 10 cm radius at a distance of 5 cm from the mirror. An object is placed s
Correct Answer - 10 cm from the lens
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A concave lens is placed in the path of convergent rays. The rays are focussed on the axis 15 cm behind the lens. Where would these rays have been foc
Correct Answer - At a distance of 10 cm behind the lens
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Find the focal length and power of a convex lens, which when placed in contact with a concave lens of focal length `25 cm` forms a real image `5` time
Correct Answer - 10 cm, 10D
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