A bi-convex lens is placed between a light source and a concave mirror as shwon such that image of the light source coincides with itself. Then,

A point object is placed at a distance of $12cm$ from a convex lens of focal length $10cm.$ On the other side of the lens, a convex mirror is placed at a distance of $10cm$ from the lens such that the image formed by the combination coincides with the object itself. The focal length of the convex mirror is

A point object is placed at a distance of $12cm$ from a convex lens of focal length $10cm.$ On the other side of the lens, a convex mirror is placed at a distance of $10cm$ from the lens such that the image formed by the combination coincides with the object itself. The focal length of the convex mirror is

A thin convex lens of focal length $30cm$ 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

A thin convex lens of focal length $30cm$ 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

Differentiate between virtual image formed by a concave mirror and of a convex mirror.

An object is placed at a distance of 15cm from a convex lenx of focal length 10cm. On the other side of the lens, a convex mirror is placed at its focus such that the image formed by the combination coincides with the object itself. The focal length of the convex mirror is

An object is placed at a distance of 15cm from a convex lenx of focal length 10cm. On the other side of the lens, a convex mirror is placed at its focus such that the image formed by the combination coincides with the object itself. The focal length of the convex mirror is

An object if placed at a distance of 15cm from a convex lens of focal length 10cm on the other side of the lens, a convex mirror is placed at its foxus such that the image formed by combination coincides with the object itself. Find the focal length of concave mirror.

A convex lens of focal length 40cm is held at a distance 12cm coaxially above a concave mirror of focale length 18cm.

Q. If the convex lens is replaced by a concave lens of focal llength 60cm, it gives rise to an image coincident with itself. then the value of d is

A convex lens is placed in contact with a plane mirror. An axial point object at a distance of $20cm$ from this combination, has its image coinciding with itself. What is the focal length of the convex lens ?