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Lens of power +2.0D is a convex lens
The eye lens of human eye is a double convex lens. Agree or Disagree?
The radii of curvature of both the sides of a convex lens are 15 cm and if the refractive index of the material of the lens is 1.5, then focal length of lens in air is ......... cm.
Answer the following questions: (c) Magnifying power of a simple microscope is inversely proportional to the focal length of the lens. What then stops us from using a convex lens of smaller and smaller focal length and achieving greater and greater magnifying power?
When monochromatic red light is used instead of blue light in a convex lens, its focal length will ......
A combination is formed by keeping a convex lens in contact with a concave lens. If both have same focal length of value 25 cm, then power of combination is ...... D.
A convex mirror and convex lens of radius of curvature 20 cm are placed on same axis with 30 cm separation. A point-like object is placed at 20 cm from convex lens and its image by this combination is obtained at object. What will be focal length of convex lens ?
Convex lens of focal length A and concave lens of focal length B are kept in contact, then the effective focal length of system is .......
Graph of position of image vs position of point object from a convex lens is shown. Then, focal length of the lens is
KUMAR PRAKASHAN-MODEL QUESTION PAPER 1-SECTION A (TRUE OR FALSE)
