Two identical glass ( 
/ 2) equi-convex lenses of focal length f each are kept in contact. The space between the two lenses is filled with water ( 
). The focal length of the combination is [NEET 2016]
A
f/3
B
f
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
Consider the situation shown is figure. Let radius of curvature of lens surfaces is R. The combination is equivalent to three lenses in contact.
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
For a concave mirror of focal length 20 cm, If the object is at a distance of 30 cm from the pole, …
Pick the wrong answer in the context with rainbow.
Which colour of the light has the longest wavelength?.
In total internal reflection when the angle ofincidence is equal to the critical angle for the pair…
Two similar thin equiconvex lenses, of focal length each, are kept coaxially in contact with each …
5. In a double slit experiment, when light of wavelength 400 nm was used, the angular width of the …