A. Focal Length
B. Radius of Curvature
C. Power
D. Magnification
Submitted by: Rashid Mehmood
The distance between the optical centre and principal focus of a lens is called focal length. Focal length of a lens depends on the refractive index of the glass and its curvature.
Related Mcqs:
- A convex mirror always ___________ ?
A. Forms a real image
B. Forms a virtual image
C. Forms an inverted image
D. Produces a larger imageSubmitted by: Rashid Mehmood
- Sagittarius-A, the Blackhole at the centre of the Milky Way Galaxy is at a distance of_________?
A. 25500 Lightyears
B. 24500 Lightyears
C. 23640 Lightyears
D. 25640 LightyearsSubmitted by: Aslan
- An optical instrument which is used measure the properties of visible light is called?
A. Microscope
B. Telescope
C. Spectroscope
D. OscilloscopeSubmitted by: Hussain Ahmed
- A clouding that develops in the lens of the eye or in its envelope obstructing the passage of light is known as________?
A. Glaucoma
B. Hemophilia
C. Cataract
D. DiphtheriaSubmitted by: Aamir Hussain Laghari
- The position of earth in its orbit, when it is at its greatest distance from the sun causing northern summer is called ___________?
A. Aphelion
B. Perihelion
C. Perigee
D. Apogee
E. None of these - Myopia is a defect of Human eye. it can be corrected by using a lens called?
A. Convex lens
B. Concave lens
C. Cylindrical lens
D. Plano convex lens
E. None of these - In what year did Galileo first use an optical telescope to study the moon?
A. 1492
B. 1609
C. 1212
D. 1743Submitted by: Malik Asghar Hussain
- Long-sight defect could be corrected by using __________ lens?
A. concave
B. Convex
C. diverging
D. none of these - Short-sight defect could be corrected by a _____________ lens?
A. concave lens
B. convex lens
C. converging lens
D. none of theseALSO CHECK: Long-sight defect could be corrected by using __________ lens?
Submitted by: Areesha Khan
- Which among the following lens is used to correct Presbyopia?
A. Bifocal
B. Convex
C. Concave
D. CylindricalSubmitted by: IHSAN MallaH
