Light of varying wavelength hits the surface of a metal. Match each wavelength of light with the observed result. 471 nm 543 nm 657 nm
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- The figure below depicts spectral reflectance measurements for three different materials: a green leaf from a healthy plant, a sheet of shiny blue paper, and the palm of a human hand. The measurements are labeled 1 (black line), 2 (red line), and 3 (blue line). Match the measurements to the most appropriate material typeRerereces Electromagnetic Spectrum 1024 - Increasing Frequency (v) 1022 1020 1018 1016 1014 1012 1010 108 106 104 102 100 v (Hz) Y rays X rays UV IR Microwave FM AM Long radio waves Radio waves 10-16 10-14 10-12 10-10 10-8 104 10-2 10° 10? 1. 104 106 108 2 (m) Increasing Wavelength (1.) Visible spectrum 400 500 600 700 Increasing Wavelength (A) in nm → Work Functions of Metals Metal (eV) Na 2.46 Al 4.08 Cu 4.70 Zn 4.31Astronomers want to observes celestial objects in the electromagnetic spectrum when the atmosphere is opaque . what options do they have?
- The inner surface of a fluorescent light bulb is coated with a wavelength shifting material. Without this coating, Question 3 options: The light would be too dim for human eyes. The light would be too bright for human eyes. The light would not escape the bulb. The light would not be visible to human eyes.In relation to x-ray imaging, which of the following statements is true? Choose one answer. a. The linear attenuation coefficient of a material is directly proportional to its half value thickness. b. For clinically useful x-rays, lead has a greater half value thickness than soft tissue. c. The intensity of an x-ray beam decreases exponentially as it passes through tissue. d. The intensity of an x-ray beam increases exponentially as it passes through tissue. e. Good contrast media are generally poor absorbers of X-rays. and Why??