A. Convex lens
B. Interferometer
C. Diffraction grating
D. Concave
Related Mcqs:
- Optical active crystals rotates the __________________?
A. vibrating plane
B. polarization plane
C. diffraction plane
D. interference plane - The breaking of crystals along definite direction is called _____________________?
A. Cleavage
B. Symmetry
C. Isotropy
D. Homogeneity - Many of the semi conductors are crystals of the type__________________?
A. Face centred cubic
B. Body centred cubic
C. Simple cubic
D. All of the above - A certain stress applied to an elastic material produces a certain strain in it. If the elastic limit is not exceeded the energy gained per unit volume of the material is given by_________________?
A. Stress/strain
B. (stress/strain)
C. Stress x strain
D. (Stress / strain) - Which one is the best material for making connecting wires ?
A. iron
B. tungsten
C. silver
D. copper - The net charge on n-type material is____________________?
A. Positive
B. Negative
C. Both positive and negative
D. Neutral - Which one of the following material is most suitable for making core of an electromagnet ?
A. air
B. steel
C. Cu-Ni alloy
D. soft iron - If a material object moves with speed of light its mass becomes ________________?
A. equal to its rest mass
B. double of its rest mass
C. infinite
D. zero - Quality of X-rays depends upon ____________ A-filament current B-accelerating voltage C-material of the target ?
A. A & B
B. B & C
C. A & C
D. A B & C - Electrons present in p-type material due to thermal pair generation are_____________?
A. majority carriers
B. minority carriers
C. dual carriers
D. blockers
