Why does the intensity of the secondary maximum become less as compared to the central maximum?
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It is because, the intensity of the central maximum is due to wavelets from all parts of the slit, the first secondary maximum is due to wavelets from one third part of the slit only, the second secondary maximum is due to the wavelets from the fifth part only and soon
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ʜᴇʏᴀ ᴍᴀᴛᴇ......
ɪᴛ ɪs ʙᴇᴄᴀᴜsᴇ, ᴛʜᴇ ɪɴᴛᴇɴsɪᴛʏ ᴏғ ᴛʜᴇ ᴄᴇɴᴛʀᴀʟ ᴍᴀxɪᴍᴜᴍ ɪs ᴅᴜᴇ ᴛᴏ ᴡᴀᴠᴇʟᴇᴛs ғʀᴏᴍ ᴀʟʟ ᴘᴀʀᴛs ᴏғ ᴛʜᴇ sʟɪᴛ, ᴛʜᴇ ғɪʀsᴛ sᴇᴄᴏɴᴅᴀʀʏ ᴍᴀxɪᴍᴜᴍ ɪs ᴅᴜᴇ ᴛᴏ ᴡᴀᴠᴇʟᴇᴛs ғʀᴏᴍ ᴏɴᴇ ᴛʜɪʀᴅ ᴘᴀʀᴛ ᴏғ ᴛʜᴇ sʟɪᴛ ᴏɴʟʏ, ᴛʜᴇ sᴇᴄᴏɴᴅ sᴇᴄᴏɴᴅᴀʀʏ ᴍᴀxɪᴍᴜᴍ ɪs ᴅᴜᴇ ᴛᴏ ᴛʜᴇ ᴡᴀᴠᴇʟᴇᴛs ғʀᴏᴍ ᴛʜᴇ ғɪғᴛʜ ᴘᴀʀᴛ ᴏɴʟʏ ᴀɴᴅ sᴏᴏɴ.
ʜᴏᴘᴇ ᴛʜɪs ᴡɪʟʟ ʜᴇʟᴘ ʏᴏᴜ......
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