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- Perry O’tic wanted to look at the atomic emission spectrum of Helium. He created a spectroscope with a diffraction grating (4900 lines per cm) and two metersticks. The diffraction grating was located 23 cm from the optical slit. When Perry O’tic looked through the diffraction grating, he observed a spectral line 8.0 cm from the optical slit. What is the wavelength of the observed spectral line?1. A helium-neon laser, radiating at 632.8 nm, has a power output of 3.0 mW. The beam diverges at angle 0.17 mrad as in fig 1. (a) What is the intensity of the beam 40m from the laser? (b) What is the power of a point source providing that intensity at that distance? Laser Figure 1: Helium neon laserE17P2
- QU: A strong paralll beam of monochromatic light i incident normally on 4 thin plate having a circular hole of diameter 1memn. 1 the wavelengih of light used 5 x 10°7m, how far i the sereen {0 be moved from the fiest position where the Centre i black 103 second simlar position?4. Two coherent beams having parallel electric fields are described by TT E₁ = 5 cos(ks₁ · wt + 3) E₂ = 3 cos +7) (ks₂ - wt+ With amplitudes in kV/m. the beams interfere at a point P where the phase difference due to path is π/4. At the point of superposition, calculate the net irradiance.3. Which of the following statement is correct about producing coherent light from an ordinary incandescent light bulb? A) Use wavelength filter to make the light spatial coherence. B) Use a pinhole to improve the temporally coherent. C) Use a pinhole to improve the spatial coherence and temporally coherent. D) Use wavelength filter to make the light temporally coherent and spatial coherence. E) Use a pinhole to improve the spatial coherence.
- You measure the distance between the finges of a diffraction pattern as follows: Distance (mm): 3.01, 3.27, 3.28 You measure the distance eight additional times to obtain the following ten values: Distance (mm): 3.01, 3.27, 3.28, 3.31, 3.16, 3.17, 3.15, 3.25, 3.18, 1.46 What values for the distance and uncertainty would you report using the first three measurements and the entire set of ten measurements? Group of answer choices First three: (3.22 ± 0.03) mm, All ten: (3.22 ± 0.02) mm First three: (3.19 ± 0.09) mm, All ten: (3.0 ± 0.2) mm First three: (3.186667 ± 0.07216237) mm, All ten: (3.201000 ± 0.02613236) mm First three: (3.216667 ± 0.02880329) mm, All ten: (3.216000 ± 0.02379916) mm First three: (3.240000 ± 0.04082483) mm, All ten: (3.217000 ± 0.02702036) mm First three: (3.24 ± 0.04) mm, All ten: (3.22 ± 0.03) mmThe hydrogen spectrum has a red line at 656 nm and a violet line at 434 nm. What angular separation between these two spectral lines is obtained with a diffraction grating that has 4172 lines/cm? (Assume that the light is incident normally on the grating.) first order separation ° second order separation ° third order separation °5. A 17.0-mW (milli-Watts) laser puts out a narrow cylindrical beam 2.50 mm in diameter. What is the average rms B-field? T 9 00m 90oo oofls f19
- Calculate the wavelengths of the following objects. A 75 kg athlete running a 3.0-minute mile: m Earth (mass = 6.0 ×× 1027 g) moving through space at 2.5×104 m/s: mPROBLEM For a given x-ray diffraction test (n = 1) on a cubic crystal structure, the recorded diffraction peaks (20) were 24.09°, 34.33°, 42.37°, 49.33°, 55.62°, and 61.48°. The x-ray wavelength used in the test was 0.15418 nm. For this test, determine the crystal structure of the element, the lattice constant, and identify the element.20. DETAILS OBINPHYS8 9.P.001. ASK YOUR TEACHE ........................ Suppose a beam of red light from an He-Ne laser (2 = 633 nm) strikes a screen containing two narrow slits separated by 0.210 mm. The fringe pattern is projected on a white screen located 1.10m away. Find the distance in millimeters between adjacent bright areas near the center of the interference pattern that is produced. mm Submit Answer