Shubham Jha - Class 10
A concave mirror of radius 30 cm is placed in water. It’s focal length in air and water differ by
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⏤‌❱⋆⋆‌⃝🦋⃟'‌🇴ANAMIKA❱⋆⋆‌⃝🦋⃟'‌, 

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