Part A A chemist identifies compounds by identifying bright lines in their spectra. She does so by heating the compounds until they glow, sending the light through a diffraction What is the wavelength emitted by compound A that have spectral line detected at position 8.55 CIII? grating. and measuring the positions of first-order spectral Express your answer with the appropriate units. lines on a detector 15.0 CIII behind the grating. Unfortunately, she has lost the card that gives the View Available Hint(s) specifications of the grating. Fortunately, she has a known compound that she can use to calibrate the grating. She heats the known compound, which emits light at a HA wavelength of 481 IIIII, and observes a spectral line POO ? 9.95 cin from the center of the diffraction pattern. XA = Value Units Submit Part B What is the wavelength emitted by compound I that have spectral line detected at position 12.15 cm? Express your answer with the appropriate units. View Available Hint(s) O ? AB = Value UnitsPart A The wings of some beetles have closely spaced parallel lines of melanin, causing the wing to act as a reflection grating. Suppose sunlight shines straight onto a beetle wing. If the melanin lines on the wing are spaced 2.9 /in apart, what is the first-order diffraction angle for green light () =550 n)? Express your answer in degrees. AZQ OB ? Submit Request AnswerPart A Light from a helium-neon laser (A = 633 nm) is used to illuminate two narrow slits. The interference pattern is observed on a screen 2.0 III behind the slits. Twelve bright fringes are seen, spanning a distance of 51 mm . What is the spacing (in mim) between the slits? Express your answer in millimeters. VI D ? d= Submit Request