Dioptre power of an concave lens of 10 cm focal length is_______________?

Related Mcqs:

If a convex lens of large aperture fails to converge the light rays incident on it to a single point, it is said to suffer from______________?

A. chromatic aberration B. spherical aberration C. both spherical and chromatic D. distortion...

The least distance of distinct vision for a normal eye is_______________?

A. 15 cm B. 25 cm C. 30 cm D. 40 cm...

A convex lens of focal length f1 and a concave lens of focal length f2 are placed in contact. The focal length of the combination is_____________?

A. f2 + f1 B. f2 – f1 C. f1f2/f2+f1 D. f1f2/f1-f2...

In optic fiber transmission system _____________ are used regenerate the dim light signal?

A. Diodes B. Repeaters C. Laser D. Transformer...

Magnification of the astronomical telescope is_____________?

A. fo+fe B. fo/fe C. fe/fo D. (1+fo/fe)L/fo...