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 A. real and inverted
B. real and erect
C. virtual and erect
D. virtual and inverted
Final image produced by a compound microscope is_____________? Read More »
Optical Instruments, Physics Mcqs A. same
B. different
C. zero
D. different with refractive index of core higher than cladding
In multimode step index fibre the refractive index of core and cladding is____________? Read More »
Optical Instruments, Physics Mcqs