Question

What is optical density?​

Answer 1

ʜᴇʏ ᴅᴜᴅᴇ......

• ᴏᴘᴛɪᴄᴀʟ ᴅᴇɴsɪᴛʏ ɪs ᴛʜᴇ ᴘʀᴏᴄᴇss ᴏғ ᴛʀᴀɴsᴍɪssɪᴏɴ ᴏғ ʟɪɢʜᴛ ᴏʀ ᴏᴛʜᴇʀ ᴇʟᴇᴄᴛʀᴏᴍᴀɢɴᴇᴛɪᴄ ʀᴀᴅɪᴀᴛɪᴏɴ ʙʏ ᴍᴀᴛᴛᴇʀ.

• ᴛʜᴇ ᴘʀᴏᴄᴇss ᴏғ ᴇᴍɪssɪᴏɴ ᴀɴᴅ ᴀʙsᴏʀᴘᴛɪᴏɴ ᴅᴇᴘᴇɴᴅs ᴏɴ ᴛʜᴇ ʀᴀᴅɪᴀᴛɪᴏɴ's ᴡᴀᴠᴇʟᴇɴɢᴛʜ, ᴡʜɪᴄʜ ɪɴᴄʟᴜᴅᴇs ᴛʜᴇ ɪɴᴛᴇʀᴀᴄᴛɪᴏɴ ʙᴇᴛᴡᴇᴇɴ ғᴜɴᴅᴀᴍᴇɴᴛᴀʟ ᴘᴀʀᴛɪᴄʟᴇs ʟɪᴋᴇ ᴇʟᴇᴄᴛʀᴏɴs, ᴀᴛᴏᴍs, ɪᴏɴs ᴇᴛᴄ.

Answer 2

$\huge\underline\pink{Question}$

$\large\underline\green{\sf What \: is \: optical \: density \: ?}$

$\huge\mathtt\purple{Answer}$

Explanation:

It is often said to be identical with the absorbance.

It is a logarithmic ratio of the falling radiation to the transmitted radiation through a material.

• For a given wavelength, the expression of optical element transmittance is expressed as:

Log10 (1/T)

$\large\underline\blue{\sf Where \: T \: is \: transmittance\: . }$

Few things to note :

• The higher the optical density, the lower the transmittance.

• The ten times of this density is equal to transmission loss expressed in decibels.
• For example, the density of 0.3 corresponds to a transmission loss of 3dB.