Hamad Optical Instruments 22/10/2021 A. focal length B. principal axis C. aperture D. radius of curvature Related Mcqs: 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 multimode step index fibre the refractive index of core and cladding is____________?A. same B. different C. zero D. different with refractive index of core higher than cladding... 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...
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