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ʟɪɢʜᴛ ᴇɴᴛᴇʀs ғʀᴏᴍ ᴀɪʀ ᴛᴏ ɢʟᴀss ʜᴀᴠɪɴɢ ʀᴇғʀᴀᴄᴛɪᴠᴇ ɪɴᴅᴇx 1.5. ᴡʜᴀᴛ ɪs ᴛʜᴇ sᴘᴇᴇᴅ ᴏғ ᴛʜᴇ ʟɪɢʜᴛ ɪɴ ᴛʜᴇ ɢʟᴀss? (sᴘᴇᴇᴅ ᴏғ ʟɪɢʜᴛ ɪɴ ᴠᴀᴄᴜᴜᴍ ɪs 3× 10^8 ᴍs -1 )
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A perfect answer with explanation thank you.
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ʜᴇʟʟᴏ ᴠᴀʀᴜ ♡
ʏᴏᴜʀ ᴀɴsᴡᴇʀ ɪs ɪɴ ᴛʜᴇ ᴘɪᴄᴛᴜʀᴇ
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