For courses in health and physical education, expenses for supplies are qualified expenses only if related to athletics. This deduction is for expenses paid or incurred during the tax year. You claim the deduction on line 23 of Form 1040 (PDF) or line 16 of Form 1040A (PDF).
In astronomy, the term spectrophotometry refers to the measurement of the spectrum of a celestial object in which the flux scale of the spectrum is calibrated as a function of wavelength, usually by comparison with an observation of a spectrophotometric standard star, and corrected for the absorption of light by the Earth's atmosphere.
The wavelengths of light used in ultraviolet-visible spectrophotometry range from about 250 nm to 750 nm, the visible range itself ranging from ~ 400 nm (violet) to ~ 700 nm (red). The instrument used to measure the amount of light absorbed by the sample is a spectrophotometer.