Visible Spectrum: All Colors & Where Is Brown? - Physics Forums
2004年8月25日 · 1. What is the visible spectrum? The visible spectrum is the range of electromagnetic radiation that our eyes are able to detect. It includes all the colors of the rainbow, from red to violet. 2. How many colors are in the visible spectrum? There are seven colors in the visible spectrum: red, orange, yellow, green, blue, indigo, and violet.
Transitions: Visible Spectrum & n=3 to n=1 - Physics Forums
2010年5月12日 · The visible spectrum corresponds to wavelengths that are between 400-700 nanometers, which correspond to energy levels that are within the range of n=2 to n=3 transitions. Transitions from n=3 to n=1 have a higher energy difference, which corresponds to wavelengths that fall outside of the visible spectrum. Therefore, these transitions would ...
Index of refraction of different wavelengths - Physics Forums
2011年12月13日 · Index of refraction of different wavelengths. In summary, the conversation discusses the phenomenon of maximum reflection of monochromatic light from a thin sheet of plastic film, with specific wavelengths of 482.9 and 676.0 in the visible spectrum. The minimum thickness of the film can be determined using the equation 2nt= (m+1/2)*lambda, but ...
Angular width of first-order visible spectrum - Physics Forums
2020年3月23日 · FAQ: Angular width of first-order visible spectrum 1. What is the angular width of the first-order visible spectrum? The angular width of the first-order visible spectrum is approximately 137 degrees. This is the angle between the red and violet ends of the spectrum when viewed from a distance of one meter. 2.
Why Do Second and Third Order Spectra Overlap in Diffraction …
2013年4月9日 · Homework Statement White light is incident normally on a diffraction grating with slit separation d of 2.00x10^-6m. a)Calculate the angle between the red and violet ends of the first-order spectrum. The visible spectrum has wavelength between 400nm and 700nm. b)Explain why the second and the...
Improving the Efficiency of Light Bulbs: Possible Solutions?
2014年10月14日 · Efficiency Light Lightbulb Thermal radiation Visible spectrum In summary, the conversation discusses ways to make a light bulb more efficient in producing visible light. One suggestion is to replace the filament with a semiconductor material, essentially turning the light bulb into an LED.
Seeing outside of the visable spectrum - Physics Forums
2003年6月13日 · Seeing outside of the visable spectrum. memorygap. Jun 13, 2003. Outside Spectrum. In summary, a device which can sense artificial light and send impulses directly to the brain would result in the stimulation of one or more channels in the adult brain, which would produce a visual experience corresponding to the wavelengths of light being sensed.
Problem with wave optics - diffraction grating? - Physics Forums
2015年2月22日 · In summary, the conversation discusses the design of a diffraction grating for a science fair project. The grating needs to disperse the visible spectrum over 30 degrees in first order, and the question asks for the number of lines per mm needed for this to be achieved. Various equations are provided, but the key equation is sin(Θ) = mλ/d.
Mean colour of visible spectrum? - Physics Forums
2015年1月20日 · 1,011. 76. Raghav Gupta said: There was a question in my practical manual- " In general for which colour we take the refractive index of a material in lens and glass slabs."". The answer was given Yellow colour. Since it is the mean colour of visible spectrum. So why my practical manual is messing here.
Photon's emmited by a 100w bulb. - Physics Forums
2008年9月4日 · In summary, the conversation discusses the calculation of the number of visible photons emitted per second by a 100w bulb, assuming that 5% of its power is radiated in the visible spectrum. The suggested approach is to use the lowest and highest wavelengths of visible light to calculate a range of photons emitted, or to use the average ...