Question
Physics Question on spherical lenses
Two lenses of power- 15 D and +5D are in contact with each other. The focal length of.the combination is
A
+10 cm
B
+20 cm
C
-10 cm
D
-20 cm
Answer
-10 cm
Explanation
Solution
Answer (c) -10 cm
Two lenses of power- 15 D and +5D are in contact with each other. The focal length of.the combination is
+10 cm
+20 cm
-10 cm
-20 cm
-10 cm
Answer (c) -10 cm