A. zero
B. focus
C. 2 f
D. f/2
Related Mcqs:
- 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 - Dioptre power of an concave lens of 10 cm focal length is_______________?
A. 10 dioptre
B. 10 dioptre
C. 1 / 10 dioptre
D. 1 / 10 dioptre - The resultant of two forces of equal magnitudes is also equal to the magnitude of the forces. The angle between the two forces is________________?
A. 30°
B. 60°
C. 90°
D. 120° - Power of a lens is one diopter if its focal length is
A. 1 meter
B. 2 meter
C. ½ meter
D. ¼ meterSubmitted by: Rizwan Ayub Saadi
- Sum of the masses of constituent nucleons as compared to the mass of the resultant nucleus is______________?
A. Smaller
B. Greater than 82
C. Same
D. Sometimes smaller some times greater - A person wears spectates with concave lenses. It means that normally (when not using glasses), the image of distant objects is focused in his eyes:
A. behind the retina
B. in front of the retina
C. on the retina
D. on the blind spotSubmitted by: Abid Hussain
- 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 - A convex lens gives a virtual image only when the objects lies_________________?
A. between principal focus and center of curvature
B. beyond 2 f
C. at the principal focus
D. between principal focus and optical center - The minimum distance between an object and its real image in a convex lens is_____________?
A. 2 f
B. 2.5 f
C. 3f
D. 4f - A convex lens acts as a diverging lens if the_________________?
A. object is beyond C
B. if the object is with in C
C. if the object is within f
D. both B and C
