Wave OpticsHard
Question
A lens is made of flint glass (refractive index = 1.5). When the lens is immersed in a liqued of refractive index 1.25, the focal length:
Options
A.increases by a factor of 1.25
B.increases by a factor of 2.5
C.increases by a factor of 1.2
D.decreases by a factor of 1.2
Solution
= (μ - 1)
= (1.5 - 1)
= (μg - 1)lμg =
⇒
= 0.5 × 5 = 2.5 fl = 2.5 × fa
Create a free account to view solution
View Solution FreeMore Wave Optics Questions
If the sodium light in Young′s double slit experiment is replaced by red light, the fringe width will :...A hole is illuminated with a monochromatic light source. Diffracted light is observed on the screen and the screen is gr...Phenomenon of interference is observed :...If in the above question, all the zones except first, second and fifth have been blocked, then resultant amplitude will ...An endoscope is employed by a physician to view the internal parts of a body organ. It is based on the principle of :...