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GATE 2025 BT – Question 60

Recombinant DNA Technology and Other Tools in Biotechnology · Analytical tools: Microscopy and spectroscopy · 2 marks · Numerical answer

The percentage of light that would pass through a sample with an absorbance of 2 would be ______%. (Round off to the nearest integer)

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Correct answer: 1

Explanation

The absorbance is $A = -\log_{10}T$, so $T = 10^{-2} = 0.01$, which is 1% of the light.