A convex lens has 15 cm focal length in air what is the focal length in water
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In water its focal length decreases
15/2=7.5
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Answer:
ɪɴ ᴡᴀᴛᴇʀ ɪᴛ's ғᴏᴄᴀʟ ʟᴇɴɢᴛʜ ᴅᴇᴄʀᴇᴀsᴇs
= 15/2
= 7.5
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