An astronomer on a planet orbiting the star Deneb wants to differentiate the reflected light by Earth from the light of the Sun. First, consider the area of Earth's disk which reflects the Sun's intercepted light. Second, consider the surface area of a sphere with the same radius as Earth’s orbit around the Sun. Take the ratio of these two areas. Assume the Earth's radius is 6200.0 km and is 1.5 × 108 km from the Sun.

An astronomer on a planet orbiting the star Deneb wants to differentiate the reflected light by Earth from the light of the Sun. First, consider the area of Earth's disk which reflects the Sun's intercepted light. Second, consider the surface area of a sphere with the same radius as Earth’s orbit around the Sun. Take the ratio of these two areas. Assume the Earth's radius is 6200.0 km and is 1.5 × 108 km from the Sun.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter16: Electromagnetic Waves

Section: Chapter Questions

Problem 45P: The electric field of an electromagnetic wave traveling in vacuum is described by the following wave...

See similar textbooks

Similar questions

The electric field of an electromagnetic wave traveling in vacuum is described by the following wave function: E =(5.00V/m)cos[kx(6.00109s1)t+0.40] j where k is the wavenumber in rad/m, x is in m, t s in Find the following quantities: (a) amplitude (b) frequency (c) wavelength (d) the direction of the travel of the wave (e) the associated magnetic field wave
Remember the wave equation is y = lambda For electromagnetic waves traveling in a vacuum, they all travel at the speed of light =c=2.998*10^ 8 s/m. A water wave (a mechanical wave, not an electromagnetic wave!) has a frequency of 20 Hz and a wavelength of 0.1 m. Calculate the speed of this wave. 1/2 * m / s; 6m / s; 3m / s; 2m / s 4 m / s
How much time is required for reflected sunlight to travel from the moon to the earth if the distance between the moon and the earth is 3.95 x 10^5 km?
The speed of a light wave in a certain transparent material is 0.679 times its speed in vacuum, which is 3.00×108 m/s. When yellow light with a frequency of 5.17×1014 Hz passes through this material, what is its wavelength λ in nanometers?
The intensity of light I through a lake at a depth of x meters is given by the following formula. dI/dx = (-2.31)I a.) At what depth is the intensity of the light half that of the intensity at the surface, I00? b.) At 5 meters deep, what is the intensity of the light as a fraction of I0? c.) How many meters deep will the intensity of light be 1 percent of the intensity of the light at the surface? Remember that the depth at the surface is x = 0.
Which of the following is least reasonable regarding light waves? a) Ultraviolet light has a shorter wavelength and lower frequency than visible light. b) Frequency is equal to the speed of the wave divided by the wavelength of the wave. c) An apple which appears red in white light would appear black when illuminated by blue light. d) Light visible to the human eye is the part of the electromagnetic spectrum with wavelengths roughly in the range of 400-700 nanometers. e) A banana appears yellow because it reflects red and green colors while absorbing blue.
Light is incident on a heavy glass slab of refractive index 1.6. The speed of light in the glass is A) 3.0 x 108 m/s. B) 2.5 x 108 m/s. C) 1.88 x 108 m/s. D) 1.5 x 10-8 m/s.
How long does it take light to travel from the Earth to the Moon? The speed of light is 2.998×105 km/s and the Moon is 3.844×105 km away from Earth, on average.
In a region of space where gravitational forces can be neglected, a sphere is accelerated by a uniform light beam of intensity 6.0 mW/m2.The sphere is totally absorbing and has a radius of 2.0 mm and a uniform density of 5.0 * 10^3 kg/m3.What is the magnitude of the sphere’s acceleration due to the light?
An electromagnetic wave with a frequency of 4.72 x 1014 Hz has a speed of 1.71 x 108 m/s when it travels through a medium. What is the index of refraction of that medium?
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 m
Remember the wave equation is v = lambda For electromagnetic waves traveling in a vacuum, they all travel at the speed of light =c=2.998*10^ 3 sin A water wave (a mechanical wave, not an electromagnetic wavelhas a frequency of 20 Hz and a wavelength of 0.1 m. Calculate the speed of this wave 8m/s 6 m/s 1/2m/s 4 m/s