TS EAMCET · Physics · Ray Optics
A lens is made of glass having an index of refraction . One side of the lens is flat and the other side is convex with a radius . If an object is placed , towards the convex side of the lens, the image is formed at on the other side of the lens. The value of is
- A
- B
- C
- D
Answer & Solution
Correct Answer
(A)
Step-by-step Solution
Detailed explanation
Using lens maker's formula, 1f=μ2μ1-11R1-1R2⇒1f=121R⇒f=2R Now using lens equation, 1v-1u=1f⇒1120-1-60=12R⇒2R=40 cm⇒R=20 cm
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