1. The speed of light c 1/u&o, where Eo is the permittivity of free space and uo is the permeability of free space. Show that the units of 1/uoɛo are meters/sec when the units of permittivity is farads/meter and the units of permeability is henrys/meter. Using the values of Eo and lo calculate the speed of light in vacuum.

1. The speed of light c 1/u&o, where Eo is the permittivity of free space and uo is the permeability of free space. Show that the units of 1/uoɛo are meters/sec when the units of permittivity is farads/meter and the units of permeability is henrys/meter. Using the values of Eo and lo calculate the speed of light in vacuum.

University Physics Volume 3

17th Edition

ISBN:9781938168185

Author:William Moebs, Jeff Sanny

Publisher:William Moebs, Jeff Sanny

Chapter1: The Nature Of Light

Section: Chapter Questions

Problem 76AP: From his measurements, Roemer estimated that it took 22 mm for light to travel a distance equal to...

See similar textbooks

Similar questions

Show that when light passes from air to water, its wavelength decreases to 0.750 times its original value.
Why does the wavelength of light decrease when it passes from vacuum into a medium? State which attributes change and which stay the same and, thus, require the wavelength to decrease.
What type of experimental evidence indicates that light is a wave?
A ray of light passes from one material into a material with a higher index of refraction. Determine whether each of the following quantities increases, decreases, or remains unchanged. Indicate your answers with I, D, or U, respectively. (a) The rays angle with the normal. (b) The lights wavelength. (c) The lights frequency. (d) The lights speed. (e) The photon energy.
Suppose you find experimentally that two colors of light, A and B, originally traveling in the same direction in air, are sent through a glass prism, and A changes direction more than B. Which travels more slowly in the prism, A or B? Alternatively, is there insufficient information to determine which moves more slowly?
Determine whether each of the following statements is true (T) or false (F). (a) The angle in Snell's law is measured between the ray and a line perpendicular to the surface. (b) The speed of light in a material increases as the materials index of refraction increases. (c) The ratio v/ of a photons speed to its wavelength has the same value for any index of refraction n. (d) Photons of blue light have a higher energy than photons of red light. (e) A photons energy depends on its brightness.
John William Strutt, Lord Rayleigh (1842-1919), invented an improved foghorn. To warn ships of a coastline, a foghorn should radiate sound in a wide horizontal sheet over die oceans surface. It should not waste energy by broadcasting sound upward or downward. Rayleighs foghorn trumpet is shown in two possible configurations. horizontal and vertical, in Figure CQ38.10. Which is the correct orientation? Decide whether the long dimension of the rectangular opening should be horizontal or vertical and argue for your decision.
What happens to a light wave when it travels from air into glass? (a) Its speed remains the same. (b) Its speed increases. (c) Its wavelength increases. (d) Its wavelength remains the same. (e) Its frequency remains the same.
Determine whether each of the following statements is true (T) or false (F). (a) The angle in Snell's law is measured between the ray and a line perpendicular to the surface. (b) The speed of light in a material increases as the materials index of refraction increases. (c) The ratio v/ of a photons speed to its wavelength has the same value for any index of refraction n. (d) Photons of blue light have a higher energy than photons of red light. (e) A photons energy depends on its brightness.
From his measurements, Roemer estimated that it took 22 mm for light to travel a distance equal to the diameter of Earth’s orbit around the Sun. (a) Use this estimate along with the known diameter of Earth’s orbit to obtain a rough value of the speed of light. (b) Light actually takes 16.5 mm to travel this distance. Use this time to calculate the speed of light.
(a) The planet Pluto and its Moon Charon are separated by 19,600 km. Neglecting atmospheric effects, should the 5.08-m-diameter Mount Palomar telescope be able to resolve these bodies when they are 4.50109 km from Earth? Assume an average wavelength of 550 nm. (b) In actuality, it is just barely possible to discern that Pluto and Charon are separate bodies using an Earth-based telescope. What are the reasons for this?
On the Moon’s surface, lunar astronauts placed a comet reflector, off which a laser beam Is periodically reflected. The distance to the Moon is calculated from the round-trip time. What percent correction Is needed to account for the delay in time due to the slowing of light in Earth’s atmosphere? Assume the distance to the Moon is precisely 3.84108 m and Earth’s atmosphere (which varies in density with altitude) is equivalent to a layer 30.0 km thick with a constant index of refraction n= l.000293.