Question

8. Mathematically, the absorbance is defined as
(1) A = log P0/P
(ii) A = -log P0/P
(iii) A = log T.
(iv) A = log P/P0​

Answer 1

A = log PO/P

Explanation:

A= log PO/P

A = log T

A. = LogP/PO

Answer 2

Mathematically, absorbance is defined as the negative logarithm of transmittance.

Explanation:

• Absorbance is the ability of a layer of a substance in order to absorb radiation which is expressed as the negative logarithm of the transmittance.
• It is the measure of the amount of light with a certain wavelength that the given material prevents from passing through it.
• It is not the measure of the amount of light that is absorbed.
• It may be calculated from the transmittance which is the fraction of light that passes through the material.
• It is mathematically the absorbance which is defined as $A = -log P0/P$