If the wavelength of light in air is 500 nm ( 1nm = 10-9 m), what is the wavelength of light in water? 3.76x10-8 m A. B. 3.76x10-7 m C. 3.08 x10-7 m D. 4.76 x10-7 m
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- If the frequency of a wave of light is 6.8 x 108 Hz, what is it's wavelength. c = 3.0 x 108 m/s A. 4.41 x 10-1 m/s B. 2.04 x 1017 m/s C. 4.41 x 10-1 m D. 2.27 m16. Light has a frequency of 5.45 1014 hertz [Note: Hz is also s-1]. What is its wavelength? Use the speed of light = 3.00 108 m/s. a. 1.82 106 nm b. 1.82 10-3 nm c. 1.82 105 nm d. 5.50 10-7 nm e. 550 nm9. A radio station is broadcasting radio signals with a frequency of 1.023 x 108Hz. It travels through air at a speed of 2.997 x 108 m/s. Solve for the length of these radio waves.
- 18. A charged particle oscillates with a frequency of 300 MHz. The wavelength of electromagnetic wave produced by this oscillator is (a) 1000 m (b) 100 m (c) 10 m (d) 1 mLight has a frequency of 7.21 × 1013 hertz. What is its wavelength? The speed of light is 3.00 × 108 m/s. a. 2.40 × 10−4 nm b. 2.40 × 105 nm c. 2.16 × 109 nm d. 4.16 × 103 nm e. 4.16 × 10−6 nm6.a. A light wave has a wavelength of 1,310 nm. What's the frequency of this wave?A. 229 THzB. 914 THzC. 371 THzD. 436 THz 6.b. A light wave has a frequency of 358 THz. What's the wavelength of this wave?A. 917 nmB. 556 nmC. 838 nmD. 1,018 nm
- 55. A cell tower is a site where antennas, transmitters, and receivers are placed to create a cellular network. Suppose that a cell tower is located at a point A(4, 6) on a map and its range is 1.5 mi. Write an equation that represents the boundary of the area that can receive a signal from the tower. Assume that all distances are in miles.Visible light corresponds roughly to the range of wavelengths from 400 nm (violet) to 700 nm (red). 1 nm = 1 nanometer = 10-9 m. What is the frequency of visible light at a wavelength of 600 nm? f= Hz Enter your answer above using scientific notation with the format x.yzEq = x.yz x109. For example, 1.23 x 10-9 is entered as 1.23E-9. What is the wavelength of a visible light wave with a frequency of 4.64 x 10¹4 Hz? λ = nm2. The nearest star to earth is the Proxima Centauri. It is approximately 4.2 lightyears away from our planet. a) Express this distance in km and in the astronomical unit. b) Calculate the time that it will take for this star's light to reach earth. 3. Find the weights of gelatin and butter contained in a cubic box with a side dimension of 0.03 cm. Gelatin has a density of 79 Ib/ft² while butter has a density of 53 lb/ft’.
- 2. A solar panel is mounted on the roof of a house. The panel is positioned at the following coordinates (measured in meters): A(8,0,0), B(8,18,0), C(0,0,8) and D(0,0,8). Let the vector S represent the intensity, in watts per square meters, having the direction of the sun's rays. B. Given that information: a) Find normal vector N where N = AB x AD (hint: find vectors AB and AD first!) b) Use N to find the area of the panel. 900 900 900, V3' v3 ' V3 c) Assuming S = (in watts per sq. meters), what is the intensity of the sun? d) What is the amount of electrical power the panel can produce? e) What is the angle, in degrees, between S and N? Round to the hundredths.3. What is the frequency of a photon that has a wavelength of 2.5 x 107 m?2. The speed of light in a vacuum is c = 3 × 10 8 m / s, and the distance from the Earth to the Sun is R ≈ 150 × 10 6 km . a. A light-minute is the distance that light travels in 1 minute. What is a light minute in meters? b. Express the Earth-Sun distance R in terms of light-minutes. c. How much time does it take for light to travel from the Sun to the Earth? 3. (1.39) Tectonic plates are large segments of Earth's crust that move slowly. Suppose a plate has average speed of v = 4.0 cm / year . a. What distance does the plate move in 1.0 s? b. Express the speed v in km/million year .