Geometrical OpticsHard
Question
A convex lens of Focal length of 40cm is in contact with a concave lens of focal length 25cm. The power of the combination is.
Options
A.-1.5 dioptress
B.-6.5 dioptress
C.+6.5 dioptress
D.+6.67 dioptress
More Geometrical Optics Questions
A ray is incident at 30o angle on plane mirror. What will be deviation after reflection from mirror....Critical angle of light passing from glass to air is minimum for...An equiconvex lens has a power of 5 dioptre. If it is made of glass of refractive index 1.5. then radius of curvature of...Graph of position of image vs position of point object from a convex lens is shown. Then, focal length of the lens is...A telescope has an objective lens of focal length 150 cm and an eyepiece of focal length 5 cm. If a 50 m talltower at a ...