CUET · PHYSICS · PYQ PAPER 2023
A concave mirror of focal length 6 cm is placed at a distance 'd' from the convex lens of focal length 8 cm. A beam of light coming from infinity and falling on this convex lens-concave mirror combination returns to infinity. The distance 'd' must be equal to:
- A 14 cm
- B 20 cm
- C 28 cm
- D 22 cm
Answer & Solution
Correct Answer
(A) 14 cm
Step-by-step Solution
Detailed explanation
Image by convex lens forms at its focal length: \( v_L = f_L = 8 \text{ cm} \). For reflected light to return to infinity, the image formed by the lens must coincide with the focal point of the concave mirror. Distance \( d = f_L + f_M \).…
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