Question

A sample has an absorbance of 2. Its transmittance would be:

• A. 1.1
• B. 0.8
• C. 0.1
• D. 0.01

Hint:

The higher the absorbance of a sample, the lower its transmittance, as more light is absorbed by the sample.

Answer 1

The Correct Option is D

The relationship between transmittance (\( T \)) and absorbance (\( A \)) is given by:
\( A = -\log_{10}(T) \)

If absorbance \( A = 2 \), transmittance (\( T \)) is calculated as:
\( T = 10^{-A} = 10^{-2} = 0.01 \)

Hence, the sample's transmittance is 0.01, or 1%.