Figure shows on object O at a distance of 40 cm from lens, a glass slab at 20 cm from lens. A concave mirror is to be placed such that final image after reflection is formed at object itself. What is/are separation of object from mirror?
A
100 cm or 40 cm
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
60 cm or 40 cm
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
102 cm or 82 cm
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
208 cm or 86 cm
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution
The correct option is C 102 cm or 82 cm
Due to presence of slab, the image of lens shifts towards right by t[1−1μ]=2cm Thus required distance is 102 cm or 82 cm