A. Diodes
B. Repeaters
C. Laser
D. Transformer
A. 42°
B. 47°
C. 52°
D. 50°
The value of critical angle for glass is_______________? Read More »
Optical Instruments, Physics Mcqs A. center of curvature
B. focus
C. optical center
D. aperture
A. 10 dioptre
B. 10 dioptre
C. 1 / 10 dioptre
D. 1 / 10 dioptre
Dioptre power of an concave lens of 10 cm focal length is_______________? Read More »
Optical Instruments, Physics Mcqs A. 2 f
B. 2.5 f
C. 3f
D. 4f
A. between principal focus and center of curvature
B. beyond 2 f
C. at the principal focus
D. between principal focus and optical center
A convex lens gives a virtual image only when the objects lies_________________? Read More »
Optical Instruments, Physics Mcqs A. 0.5
B. 0.2
C. 1
D. 2
A. increases with increase in age
B. decreases with increase in age
C. neither increases nor decreases
D. becomes infinite after 60 years
Least distance of distinct vision_____________? Read More »
Optical Instruments, Physics Mcqs A. zero
B. focus
C. 2 f
D. f/2
A. fo + fe
B. fo – fe
C. fo / fe
D. fe / fo
For normal adjustment, length of astronomical telescope is______________? Read More »
Optical Instruments, Physics Mcqs