Αποτελέσματα Αναζήτησης
Calculate the mean wavelength of the laser light and compare it with the accepted value of 635 nm. Assess the percentage uncertainty in this result.
Explain why the higher the frequency, the shorter the wavelength of an electromagnetic wave. Draw a simplified electromagnetic spectrum, indicating the relative positions, frequencies, and spacing of the different types of radiation bands. List and explain the different methods by which electromagnetic waves are produced across the spectrum.
Example \(\PageIndex{1}\): Precise Distance Measurements by Michelson Interferometer. A red laser light of wavelength 630 nm is used in a Michelson interferometer. While keeping the mirror \(M_1\) fixed, mirror \(M_2\) is moved. The fringes are found to move past a fixed cross-hair in the viewer.
Suppose you pass light from a He-Ne laser through two slits separated by 0.0100 mm and find that the third bright line on a screen is formed at an angle of \(10.95^{\circ}\) relative to the incident beam. What is the wavelength of the light? Strategy: The third bright line is due to third-order constructive interference, which means that \(m=3\).
wavelength light in the spectrum (red) and the shortest wavelength light (violet). Reporting your results: 1. Calculate and report the wavelengths of the laser obtained from your measurements of the first and second order interference maxima, λ 1 and λ 2. 2. Calculate and report the fractional discrepancy between λ 1 and λ 2. 3.
Michelsons interferometer has become a widely used instrument for measuring the wavelength of light, and for using the wavelength of a known light source to measure extremely small distances. Figure 1 shows a diagram of a Michelson interferometer. A beam of light from the laser source strikes the beam-splitter.
Measurement of Wavelengths of Light. Goal: Measure the wave length of light with a diffraction grating. Reference: Ch. 4 in text. Introduction. A transmission diffraction grating consists of a thin piece of clear plastic on which are scratched many closely-spaced parallel lines, from which light scatters as if from many parallel slits.
