Four students A, B, C and D obtained a highly diminished, real and inverted image of a tree on a screen and carried out measurement of focal length of the given concave m shown in the following diagrams. (A) (B) (C) Students likely to get correct value of focal length are : b) B and C a) A and B c) C and D (D) d) D and A
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Answer:
b) B and C
Explanation:
In order to determine the correct value of the focal length of the given concave mirror, students need to measure the object distance (u) and the image distance (v) accurately.
Looking at the options:
- Student B is likely to get the correct value because they have positioned the object and screen appropriately, ensuring accurate measurements of u and v.
- Student C is also likely to get the correct value as they have arranged the setup properly.
On the other hand:
- Student A might face issues as the object is too close to the mirror, which could lead to inaccuracies in measurements.
- Student D has placed the object too far away, which could also lead to incorrect measurements.
Therefore, based on the given diagrams, students B and C are more likely to obtain the correct value of the focal length.