NEETPhysicsRay Optics
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): A fish in a pond looks at a bird flying vertically above in the air. To the fish, the bird appears to be at a greater height from the water surface than its actual height. Reason (R): The apparent height h' of an object at actual height h in a rarer medium of refractive index n₁ , when viewed from
Options
- ABoth (A) and (R) are true and (R) is the correct explanation of (A)
- BBoth (A) and (R) are true but (R) is not the correct explanation of (A)
- C(A) is false but (R) is true
- D(A) is true but (R) is false
Correct answer
D. (A) is true but (R) is false
Step-by-step solution
Evaluate the Assertion (A): When an object in a rarer medium (air) is viewed from a denser medium (water), the apparent height is given by h' = h n_ observer n_ object . Here, n_ observer = n_ water and n_ object = n_ air . Since n_ water > n_ air , the apparent height h' is greater than the actual height h . Thus, the bird appears to be at a greater height. The Assertion (A) is true. Evaluate the Reason (R): The general formula for apparent height/depth is h' = h ( n_ observer n_ object ) . In the given scenario,