A concave mirror of radius of curvature 50 cm is used to form an image of an object kept at a distance of 25 cm from the mirror on its principal axis. What will be the position of the image from the mirror ?
At infinity
At 50 cm
At 25 cm
At 75 cm
Answer is Right!
Answer is Wrong!
This question was previously asked in
UPSC CDS-2 – 2023
We use the mirror formula: 1/f = 1/v + 1/u, where v is the image distance.
Substituting the values: 1/(-25) = 1/v + 1/(-25)
-1/25 = 1/v – 1/25
1/v = -1/25 + 1/25
1/v = 0
This implies v = infinity.