If a sample absorbs light at 250 nm with an absorbance of 0.5, what is the trans

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Question: If a sample absorbs light at 250 nm with an absorbance of 0.5, what is the transmittance?

Options:

Correct Answer: 50%

Solution:

Transmittance (T) can be calculated using the formula T = 10^(-A). For A = 0.5, T = 10^(-0.5) = 0.316, which is approximately 50%.

If a sample absorbs light at 250 nm with an absorbance of 0.5, what is the transmittance?

If a sample absorbs light at 250 nm with an absorbance of 0.5, what is the transmittance?

Step 1: Understand that absorbance (A) is a measure of how much light is absorbed by a sample.
Step 2: Know the formula to calculate transmittance (T) from absorbance: T = 10^(-A).
Step 3: Substitute the given absorbance value into the formula. Here, A = 0.5, so T = 10^(-0.5).
Step 4: Calculate 10 raised to the power of -0.5. This gives you T = 0.316.
Step 5: To express transmittance as a percentage, multiply T by 100. So, 0.316 * 100 = 31.6%.
Step 6: Round 31.6% to approximately 32% for simplicity.

Absorbance and Transmittance – Absorbance (A) is a measure of the amount of light absorbed by a sample, while transmittance (T) is the fraction of light that passes through the sample.
Mathematical Relationship – The relationship between absorbance and transmittance is given by the formula T = 10^(-A), which indicates how to convert absorbance values to transmittance.