Question

What is a dimensionless quantity ?

Explain what is monochromatic light ?

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Qais bhaiya meri study abhi baki hai

good morning Bhaiya​

Answer 1

Answer:

●ᴡʜᴀᴛ ɪs ᴀ ᴅɪᴍᴇɴsɪᴏɴʟᴇss ǫᴜᴀɴᴛɪᴛʏ ?

⟼ ᴅɪᴍᴇɴsɪᴏɴʟᴇss ǫᴜᴀɴᴛɪᴛʏ ɪs ᴀ ǫᴜᴀɴᴛɪᴛʏ ᴡʜɪᴄʜ ɪs ɪɴᴅᴇᴘᴇɴᴅᴇɴᴛ ᴏʀ ᴅᴏᴇsɴ'ᴛ ʜᴀᴠᴇ ᴀ ᴘʜʏsɪᴄᴀʟ ᴏʀ ғᴜɴᴅᴀᴍᴇɴᴛᴀʟs ᴜɴɪᴛ ʟɪᴋᴇ ʟᴇɴɢᴛʜ, ᴍᴀss, ᴛɪᴍᴇ ᴇᴛᴄ.

⟼ ᴅɪᴍᴇɴsɪᴏɴʟᴇss ǫᴜᴀɴᴛɪᴛʏ ɪs ᴀ ᴘᴜʀᴇʟʏ ɴᴜᴍʙᴇʀ.

⟼ ᴅɪᴍᴇɴsɪᴏɴʟᴇss ǫᴜᴀɴᴛɪᴛʏ ɪs ᴀʟsᴏ ᴋɴᴏᴡɴ ᴀs ǫᴜᴀɴᴛɪᴛʏ ᴏғ ᴅɪᴍᴇɴsɪᴏɴs.

●ᴇxᴘʟᴀɪɴ ᴡʜᴀᴛ ɪs ᴍᴏɴᴏᴄʜʀᴏᴍᴀᴛɪᴄ ʟɪɢʜᴛ ?

⟼ ᴛʜᴇ ʟɪɢʜᴛ ᴏғ ᴅɪғғᴇʀᴇɴᴛ ғᴜɴᴅᴀᴍᴇɴᴛᴀʟ ᴄᴏʟᴏᴜʀs ʀᴇᴛᴀɪɴ ᴛʜᴇɪʀ ᴄᴏʟᴏᴜʀ ɪɴᴛᴀᴄᴛ - ᴡʜɪᴄʜ sʜᴏᴡs ᴛʜᴀᴛ ᴇᴀᴄʜ ᴄᴏʟᴏᴜʀ ᴏғ ᴛʜᴇ sᴘᴇᴄᴛʀᴜᴍ ɪs ᴄᴀʟʟᴇᴅ ᴍᴏɴᴏᴄʜʀᴏᴍᴀᴛɪᴄ ʟɪɢʜᴛ.

⟼ ᴇxᴀᴍᴘʟᴇ : sᴏᴅɪᴜᴍ ʟᴀᴍᴘ ɪs ᴀ ᴄᴏᴍᴍᴏɴ sᴏᴜʀᴄᴇ ᴏғ ᴍᴏɴᴏᴄʜʀᴏᴍᴀᴛɪᴄ ʟɪɢʜᴛ.

●ᴇxᴛʀᴀ ɪɴғᴏʀᴍᴀᴛɪᴏɴ :-

⇝ ʀᴇғʀᴀᴄᴛɪᴏɴ ᴏғ ʟɪɢʜᴛ :

ᴛʜᴇ ᴄʜᴀɴᴄᴇ ɪɴ ᴅɪʀᴇᴄᴛɪᴏɴ ᴏғ ᴛʜᴇ ᴘᴀᴛʜ ᴏғ ʟɪɢʜᴛ ᴡʜɪʟᴇ ᴛʀᴀᴠᴇʟʟɪɴɢ ғʀᴏᴍ ᴏɴᴇ ᴛʀᴀɴsᴘᴀʀᴇɴᴛ ᴍᴇᴅɪᴜᴍ ᴛᴏ ᴀɴᴏᴛʜᴇʀ ᴏʙʟɪǫᴜᴇʟʏ ɪs ᴄᴀʟʟᴇᴅ ʀᴇғʀᴀᴄᴛɪᴏɴ ᴏғ ʟɪɢʜᴛ.

⇝ ʟᴀᴡs ᴏғ ʀᴇғʀᴀᴄᴛɪᴏɴ :

1) ᴛʜᴇ ғɪʀsᴛ ʟᴀᴡ :

ᴛʜᴇ ɪɴᴄɪᴅᴇɴᴛ ʀᴀʏ, ᴛʜᴇ ʀᴇғʀᴀᴄᴛᴇᴅ ʀᴀʏ ᴀɴᴅ ᴛʜᴇ ɴᴏʀᴍᴀʟ ᴀᴛ ᴛʜᴇ ᴘᴏɪɴᴛ ᴏғ ɪɴᴄɪᴅᴇɴᴄᴇ ᴏɴ ᴛʜᴇ ʀᴇғʀᴀᴄᴛɪɴɢ sᴜʀғᴀᴄᴇ ᴀʟʟ ʟɪᴇ ɪɴ ᴛʜᴇ sᴀᴍᴇ ᴘʟᴀɴᴇ.

2) ᴛʜᴇ sᴇᴄᴏɴᴅ ʟᴀᴡ :

ᴛʜᴇ sᴇᴄᴏɴᴅ ʟᴀᴡ ᴏғ ʀᴇғʀᴀᴄᴛɪᴏɴ ᴡᴀs ᴅɪsᴄᴏᴠᴇʀᴇᴅ ʙʏ ᴅᴜᴛᴄʜ sᴄɪᴇɴᴛɪsᴛ ᴡɪʟʟᴇʙʀᴏᴅ sɴᴇʟʟ, sᴏ ᴛʜɪs ʟᴀᴡ ᴏғ ʀᴇғʀᴀᴄᴛɪᴏɴ ɪs ᴄᴀʟʟᴇᴅ sɴᴇʟʟ's ʟᴀᴡ.

⇝ ᴅɪsᴘᴇʀsɪᴏɴ ᴏғ ʟɪɢʜᴛ :

ᴛʜᴇ ᴘʜᴇɴᴏᴍᴇɴᴏɴ ᴏғ sᴘʟɪᴛᴛɪɴɢ ᴜᴘ ᴏғ ᴡʜɪᴛᴇ ʟɪɢʜᴛ ɪɴᴛᴏ ɪᴛs ᴄᴏɴsᴛɪᴛᴜᴇɴᴛ ᴄᴏʟᴏᴜʀs ᴏɴ ᴘᴀssɪɴɢ ᴛʜʀᴏᴜɢʜ ᴀ ʀᴇғʀᴀᴄᴛɪᴏɴ ᴍᴇᴅɪᴜᴍ ɪs ᴄᴀʟʟᴇᴅ ᴅɪsᴘᴇʀsɪᴏɴ ᴏғ ʟɪɢʜᴛ.

⇝ sᴄᴀᴛᴛᴇʀɪɴɢ ᴏғ ʟɪɢʜᴛ :

ᴡʜᴇɴ ʟɪɢʜᴛ ᴡᴀᴠᴇ ᴘᴀssᴇs ᴛʜʀᴏᴜɢʜ ᴛʜᴇ ᴀᴛᴍᴏsᴘʜᴇʀᴇ, ɪᴛ ɪs ᴀʙsᴏʀʙᴇᴅ ʙʏ ᴛʜᴇ ᴍᴏʟᴇᴄᴜʟᴇs ᴏғ ᴀɪʀ, ᴛʜᴇsᴇ ᴍᴏʟᴇᴄᴜʟᴇs ғᴜʀᴛʜᴇʀ ᴇᴍɪᴛ ᴠɪsɪʙʟᴇ ʀᴀᴅɪᴀᴛɪᴏɴ ɪɴ ᴀʟʟ ᴅɪʀᴇᴄᴛɪᴏɴs ᴀɴᴅ ᴛʜɪs ᴘʜᴇɴᴏᴍᴇɴᴏɴ ɪs ᴄᴀʟʟᴇᴅ sᴄᴀᴛᴛᴇʀɪɴɢ ᴏғ ʟɪɢʜᴛ.