A convex lens `(f=20cm)` is placed at `80 cm` from a concave mirror. An object is placed at `30 cm` in front the lens such that position of its final image is same with or without the mirror. The maximum distance of object and mirror for a virtual image to be formed if only mirror is present is :
A convex lens of focal length 15 cm is placed on a plane mirror. An object is placed at 30 cm from the lens. The image is
A convex lens of focal length 15 cm is placed on a plane mirror. An object is placed 20 cm from the lens. The image is formed
An object is placed at 20 cm from a convex mirror of focal length 10 cm. The image formed by the mirror is
An object is placed at a distance of 30 cm from a concave mirror and its real image is formed at a distance of 30 cm from the mirror. The focal length of the mirror is
An object is placed in front of a convex mirror of a radius of curvature 20 cm. Its image is formed 8 cm behind the mirror. The object distance is
An object is placed at 20 cm from a convex mirror of focal length 20 cm. The distance of the image from the pole of the mirror is
An object is placed at a distance of 25 cm from a spherical mirror, its image is formed behing the mirror at a distance of 5 cm. The focal length and type mirror is
A thin convex lens of focal length 30 cm is placed in front of a plane mirror. An object is placed at a distance x from the lens (not in between lens and mirror ) so that its final image coincides with itself. Then, the value of x is
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