Ex. 2: Red light of wavelength 6400 A in air has wavelength 4000 Å in glass. If the wavelength of violet light in air is 4400 Ă What is its wavelength in glass? 0
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- You may often refer to "blue sky" without considering why it has that color. The answer a physicist would give depends on what phenomena? Rayleigh scattering, that the power of the light scattered by fluctuations in density and very small particles is proportional to 1/λ4. Refraction of light that depends on wavelength Absorption by molecular oxygen InterferenceTwo waves of light in air, of wavelength 600.0 nm, are initially in phase. They then travel through plastic layers as shown in the figure below, with L1 = 4.44 µm, L2 = 3.97 µm, n1 = 1.45, and n2 = 1.62. What multiple of A gives their phase difference after they have both emerged from the layers? Give absolute value. L1 Number i 0.906 Units This answer has no unitsA radar for tracking aircraft broadcasts a 12 GHz microwave beam from a 2.0-m-diameter circular radar antenna. From a wave perspective, the antenna is a circular aperture through which the microwaves diffract.a. What is the diameter of the radar beam at a distance of 30 km?b. If the antenna emits 100 kW of power, what is the average microwave intensity at 30 km?
- Light has a wavelength of 450 nm in vacuum. It enters a glass prism with an index of refraction 1.6. What is the wavelength in glass? What is the speed of light in glass? What is the frequency in glass?a thin film of MgF2 (n = 1,38) with thickness of 8,25×10−5 cm was put on glass (n =1,55). If white light falls perpendicular to the surface, what wavelengths are missing from the reflected light? (Hint: only keep the wave lengths corresponding to visible light between 400 nm et 700 nm.)1
- 3.A film material with n coating is 380nm thick. White light is incident perpendicularly to the coating. a. Calculate the frequency of a green light (570TH2) inside the film. 1.25 is used as a coating on a piece of flat glass (n : 1.55). TheYou are in a room lit only by cyan light. A chair in that room looks blue to you. (Your eyes see red + green light as yellow; your eyes see red+ blue light as magenta; your eyes see green and blue light as cyan) a. What colors of light is the chair reflecting in the cyan room? What colors of light is the chair absorbing in that room? Explain. b. You then move the chair into a room lit only by red light. The chair now looks red. What colors of light is the chair reflecting now? What colors of light is it absorbing now? Explain. c. What color will the chair be in the sunlight? Explain.
- 13. 14. Consider the following properties of light: rectilinear propagation reflection refraction diffraction I. II. III. IV. V. partial reflection-refraction Which of these properties did Huygens have trouble explaining with his theory of light? I only IV only I and IV only I and V only a. b. C. d. Monochromatic light coming from the left passes through a slit S and then falls on a metal sheet with two slits B and C as shown below. The slits are the same width. The light then falls on a screen. S | 5.0 m C .0 mm (a) 1.5 x 10-5 cm (e) 15 x 10-5 cm -10.0 m- The intensity pattern shown below is centred at P. 0 3 Distance (cm) The wavelength of the light is closest to (b) 4.5 x 10-5 cm P (c) 5.0 x 105 cm (d) 7.5 x 10-5 cmYou are in a room lit only by blue light. A chair in that room looks black to you. (Your eyes see red + green light as yellow; your eyes see red+ blue light as magenta; your eyes see green and blue light as cyan) a. What colors of light is the chair reflecting in the blue room? What colors of light is the chair absorbing in that room? Explain. b. You then move the chair out into the sunlight. What possible colors could the chair be in the sunlight? Explain.asap pls