Request edit access
Geometrical Optics - 2
Email *
Student ID *
The power of a lens combination having two lenses of different focal lengths and kept at a distance equal to sum of their focal lengths is *
2 points
The focal length of a biconvex lens of radii of each surface 50 cm and refractive index 1.5, is *
2 points
If two +5D lenses are mounted at a distance d apart, the equivalent power will always be negative if *
2 points
Name *
The focal length of the combination of two convex lenses of focal length 0.15 m placed 0.05 m apart is *
2 points
If a convex lens of focal length 80 cm and a concave lens of focal length 50 cm are combined together, what will be their resulting power? *
2 points
Two thin lenses have a combined power of + 9 D. When they are separated by a distance of 20 cm, their equivalent power becomes + 27/5 D. Their individual powers (in dioptre) are *
2 points
Two thin convex lenses of focal lengths f1 and f2 are kept coaxially in air at a distance d apart. If the space between the lenses is filled by a liquid of refractive index \mu, then the equivalent focal length of the combination will be *
2 points
Air bubble in water behaves as *
2 points
A convex lens of focal length f1 and a concave lens of focal length f2 are placed at a distance d apart. The focal length of the combination is *
2 points
The power of a lens in air (n of glass = 1.5) is +3D. The power of the same lens in in water (n = 4/3) is *
2 points
Submit
Clear form
Never submit passwords through Google Forms.
This content is neither created nor endorsed by Google. Report Abuse - Terms of Service - Privacy Policy
Google Forms