Two convex lenses of equal focal length f are placed in contact the resultant focal length of the combination 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...

The value of critical angle for glass is_______________?

A. 42° B. 47° C. 52° D. 50°...

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

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

Michelson calculated the speed of light using the instruments______________?

A. spectrometer B. galvanometer C. interferometer D. none of these...