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- How is the UV spectrometer work? What is absorbance and how is it determined?In absorption spectrophotometry: a. Absorbance is directly proportional to transmittance b. Percent transmittance is directly proportional to concentration c. Percent transmittance is directly proportional to the light path length d. Absorbance is directly proportional to concentrationAnswer all the questions. 1. How do you calculate total magnification? 2. Which lens requires the use of cedarwood oil? Why is it important to use oil when focusing under this lens?
- 1. How is ultraviolet light used in forensic photography? 2. How is infrared light used in forensic photography?Match the following items: [4] 1. 540 nm A. Wavescan 2. Quantity of light of a specific wavelength absorbed by a sample B. Standard series 3. Reference samples with a concentration range C. Absorbance 4. Absorbance values at all wavelengths D. PurpleCan someone explain the concept behind a sample that lies in the UV range in a spectrophotometer? Please explain in detail and clearly. Thank you!
- Which of the following is not required for a UV-vis absorption spectrophotometer? Group of answer choices camera detector monochromator light sourceSome spectrophotometers use wavelengths of light in the ultraviolet range. What are wavelengths of light that are in the ultraviolet range?Which of the ff. best describes the configuration of a traditionalcolorimeter? a.) light source --> wavelength selector --> sample holder --> wavelength detector --> photon detectorb.) light source --> sample holder -> wavelength detector -> photon detectorc.) light source --> wavelength selector --> sample holder --> photon detectord.) light source --> wavelength selector --> sample holder --> wavelength detector
- 1. What happens to your image if you try to magnify it using 40x or 100x?Select ALL the correctly matched terms: a. Immersion oil/ Oil with a different refrative index than air, used to enhance magnification b. Luminescence/ Absorption of light and energy within a sample c. Fluorescence/ Absorbed light rays are changed into longer wavelengths and re-emitted d. Diffraction/ Bending of light rays around an openingThe process that most accounts for magnification is a. a condenser c. illumination b. refraction of light rays d. resolution
