3. Why does absorbance increase with concentration? 4. What is happening on the atomic level when a photon of light is absorbed? 5. Use Beer's Law to explain why you should ideally use the same cuvette for all absorbance measurements. Hint: remember path length 6. Determine the value of e (including units) for the solution. Hint: the slope of the line of best fit is equal to eb, and b = 1 cm. 7. In 1913 Niels Bohr proposed the Bohr model of the atom. His model was based on the line spectra of the hydrogen atom. Explain what is correct about the Bohr model and what is ncorrect. 8. Bonus**Why is the absorbance spectra of a molecule very broad, while atoms have line spectra?