In optical bench experiment, the index error is `+1cm` between object needle and lens,between lens and image needle the index error is `-1cm` Observed values of object distance `(u)` and image distance `(v)` are `11cm` and 14cm Focal length of the lens is______ cm

Find the distance of an object from a convex lens if image is two times magnified. Focal length of the lens is 10cm

Find the distance of an object from a convex lens if image is two times magnified. Focal length of the lens is 10cm

The distance between the object and its real image from the convex lens is 60 cm and the height of image is two times the height of object . The focal length of the lens is

An object is placed at a distance of 12 cm from a convex lens of focal length 8 cm. Find : nature of the image

A convex lens forms an image of an object on a screen 30 cm from the lens. When the lens is moved 90 cm towards the object, then the image is again formed on the screen. Then, the focal length of the lens is

A cocave lens forms the image of an object such that the distance between the object and image is 10 cm and the magnification produced is 1/4. the focal length of the lens will be

A concave lens forms the image of an object such that the distance between the object and image is 10cm and the magnification produced is 1/4. The focal length of the lens will be

To find index error e distance between object needle and pole of the concave mirror is 20 cm . The separation between the indices of object needle and mirror was observed to be 20.2 cm in some observation, the observed image distance is 20.2 cm and the object distance is 30.2 cm find (a) the index error e. (b) focal length of the mirror f .

In an experiment for the determination of focal length of the convex mirror a convex lens of focal length 20cm is placed on the optical bench and an object pin is placed at a distance 30cm from the lens. When a convex mirror is introduced in between the lens and the real and inverted image of the object, the final image of object O is formed at O itself. If the distance between the lens and the mirror is 10cm, then the focal length of the mirror is

To find index error for u when a knitting needle of length 20.0cm is adjusted between pole and object needle the separation between the indices of object needle and mirror was pbserved to be 20.2 cm Index correction for u is .