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- To separate the two wavelengths of 5000 and 5001 angstroms, we use a Fabry Pro. Suggest the thickness of this Fabry Pro and the reflection coefficient of its plates.The distance between atoms in a molecule is about 10-8 cm . Can visible light be used to “see” molecules?Why is there no transmitted ray beyond a definite angle? Describe the behavior of the ray at this angle.
- 12. Take two ideal polaroid (the first with its axis vertical and the second , horizontal) and insert between them a stack of 10 half-wave plates - the first with its fast axis rotated pi/40radians from the vertical,and each subsequent one rotation pi/40 from the previous one . Determine the ratio of emerging to incident irradiance.A pure red object on a black background seems to disappear when illuminated with pure green light. Explain why.1. The electric field of a light wave propagating in a medium of re fracti ve E = 10N/C cos(1015t+ 5.10€y)i index be expresse d a s сan Determine the following: propagation constant, period, velocity in the medium, refractive index of the medium and magnetic field associated with this electric field. 2a.(i) A photon of wavelength 1.06µm is combined with a photon of wavelength 0.85µm to create a new photon whose energy is the sum of energies of these two photons. What is the wavelength of the new photon? (ii)How many photons are emitting from the laser diode in 5 minutes if its power is 1mW? 2b. A 1.55-um digital communication system operating at 1 Gb/s receives an average power of –40 dBm at the detector. Assuming that 1 and 0 bits are equally likely to occur, calculate the number of photons received within each 1 bit.
- 10:54 AM Thu Apr 23 * 79% A cdn.inst-fs-iad-prod.inscloudgate.net (5) If unpolarized light is incident from the left on three polarizes as shown in figure, in which case will some light get through? (a) Case 1 only. (b) Case 2 only. (c) Case 3 only (d) Case 1 and 3 3 (e) All three cases( Why? From fireworks to stars, the color of light is useful in finding out what's in matter. The emission of g by hydrogen and other atoms has played a key role in understanding the electronic structure of atoms. Trace materials, such as evidence from a crime scene, lead in paint or mercury in drinking water, can be identified by heating or burning the materials and examining the color(s) of light given off in the form of bright-line spectra. Model 1 - White Light Lightbulb (white light) Prism Color Reds Oranges Yellows Greens Blues Violets Photon Energy (x 10-2¹) (J) 269-318 318-337 337-352 352-382 382-452 452-523 2. What happens to white light when it passes through a prism? Wavelength Range (nm) 625-740 590-625 565-590 520-565 440-520 380-440 Speed (m/s) 3.00 x 108 3.00 x 108 3.00 × 108 3.00 x 108 3.00 x 108 3.00 x 108As the diameter of a laser beam increases O a. The divergence of the beam will remain the same O b. The intensity of the beam increases O C. The divergence of the beam decreases O d. The divergence of the beam increases
- 2c. Calculate the speed of red light with a wavelength of 650. num in air as it passes through a water droplet with an index of refraction n- 1.33, If the water droplet is a sphere with a radius of 1.5 mm, how many complete wavelengths of this light fit inside the droplet? (Can we obtain both large depth of field and high resolution in optical microscope? How does it compare to the electron microscope? Explain the difference.From the data shown in the image, the value of Oc is: 1₂ Ilo 7₁ = 1.49 11₂ 30° 69 O 72 O 75.11 70.43 Not from the above 0
