A convex lens (of focal length `20 cm)` and a concave mirror, having their principal axes along the same lines , are Kept `80cm` is to from eath other . The concave mirror is to the right of the convex lens. When an object is Kept at a distance of `30 cm` to the left of the convex lens,its image remains at the same position even if the concave mirror is removed . The maximum distance of the object for which the concave mirror , by itself would produce a virtual would be:
A convex lens (of focal length 20 cm) and a concave mirror, having their principal axes align the same lines, are kept 80 cm apart from each other. The concave mirror is to the right of the convex lens. When an object is kept at a distance of 30 cm to the left of the convex lens, its image remains at the same position even if the concave mirror is removed. The maximum distance (in cm) of the object for which this concave mirror, by itself would produce a virtual image would be:
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 concave lens of focal length 20 cm placed in contact with ah plane mirror acts as a convex mirror of focal length
An object is kept at a distance 20 cm from a convex mirror of focal length 20 cm. The image will form at
If a convex lens of focal length 20 cm and a concave lens of focal length 30 cm are kept in contract with each other. What will the power of the combination ?
If a convex lens of focal length 20 cm and a concave lens of focal length 30 cm are kept in contract with each other. What will be the focal length of the combination ?
If the convex lens of focal length 10 cm and a concave lens of focal length 50 cm are kept in contact with each other. What will be the behaviour of the combination (behaviour as a convex lens/concave lens) ?
If a convex lens of focal length 20 cm and a concave lens of focal length 30 cm are kept in contract with each other. What will be the behaviour of the combination ?
A convex lens of focal length 10cm and concave lens of focal length 20 cm are kept 5 cm apart. The focal length of the equivalent lens is
