The intensity of light from a central source varies inversely as the square of the distance. If you lived on a planet only half as far from the Sun as our Earth, how would Sun’s light intensity compare with that on Earth? How about a planet 10 times farther away than Earth?

Q: A man’s eyes 2.5 m above sea level can barely see the top of a lighthouse which is at a certain…

A:

Q: A radio transmitter broadcasts at a frequency of 155kHz. What is the wavelength of the wave? ( speed…

A:

Q: If an observer moves 10 times further away from the sun that earths orbit

A:

Q: The frequency of light coming out from a laser source is 236 MHz. What is the wavelength…

A:

Q: of illumination emitted by the sun at the greatest wavelength λmax = 0.5 pm and the greatest…

A: Given values:- Amount of illumination emitted at the greatest wavelength,(λmax)=0.5 pm -----(1)…

Q: Approximately how long would it take a telephone signal to Travel 480 km ( 1km= 1000m) from earth to…

A: (given)  A telephone signal to travel  from the Earth= 480 km = 480000 m nearly with speed of light…

Q: In astronomy, distances are often expressed in light-years. One light-year is the distance traveled…

A:

Q: A radio transmitter broadcasts at a frequency of 172kHz. What is the wavelength of the wave? ( speed…

A:

Q: If the sun is 1.5 x 10^8 km from Earth, how long does it take light to strike Earth when traveling…

A:

Q: Standing on the beach at sunset, you extend the tip of your finger at your full arm length from your…

A:

Q: Calculate the speed of a radio wave traveling through space if it has a wavelength of 6.35 cm.…

A:

Q: Our nearest star (other than the Sun) is 4.2 light-years away. That is, it takes 4.2 years for the…

A: One light year is the distance the light will travel in a time of one year. The distance can be…

Q: Which of the following are characteristic of ultraviolet radiation from a star?   a. It will not…

A: Ultraviolet radiation comes from a hotter region of the electromagnetic spectrum than visible light.

Q: Approximately how many times could light travel around the Earth in one second? 5 times 7 times 70…

A:

Q: A communications satellite is in geosynchronous orbit. This means that its orbit coincides with the…

A: Let R, h, and θ denote the radius of the earth, the height of geostationary satellite, and the…

Q: What are the restrictions on the orbit of a communications satellite if it is to appear motionless…

A: The period of the orbit of a satellite depends on its distance from the center of the earth.

Q: The light from the sun takes 400 s to reach the earth. Assuming that the speed of the light is 2,…

A:

Q: Mention what is the speed of light in space?

A: The speed/velocity of light is different in different media. Light is an electromagnetic radiation.…

Q: What is the distance in meters to our Sun that is 500 light-seconds away?

A: The time taken by the light to travel from Earth to Sun is t = 500 seconds. Assume the speed of the…

Q: Orange-red  light has a wavelength of about 600 nm (nanometers).  What is the time required for this…

A: Given data:  Wavelength (λ) = 600 Nm = 600×10-9 m Required: Time required by light to travel…

Q: The distance from the Earth to the sun is 1.496x1011 m. A solar flare occurs on the sun’s surface on…

A: Given:- d = 1.496 x 1011 m

Q: A searchlight is directed to a plane flying directly above the light at an altitude of 3km and at a…

A:

Q: Suppose you are standing such that a 32-foot tree is directly between you and the sun. If you are…

A:

Q: Approximately how long would it take a radio signal to reach the International Space Station (ISS)…

A:

Q: True or False: When a light source approaches us, there is an increase in the frequency we measure.…

A:

Q: If a star is moving towards us, what color will it appear?

A: a star is coming toward earth. we have to predict its color. CONCEPT: as star is coming toward us…

Q: Light from the sun reaches us in nearly   A) 5 min B) 4.30 hrs C) 8 min D) 5.30 hrs

A: When the light from the sun reaches us, the approximate distance traveled by the light is the…

Q: 4.1 The technology known as Radar is used to determine distances to various objects by measuring the…

A:

Q: If the frequency of the wave used by your favourite station is 97.6 Megahertz, what is the…

A: In the question given Frequency= 97.6 MHz and we have to find the value of wavelength. And given the…

Q: ) Light travels at the speed of 1.17 x 10^7 miles per minute. Pluto’s average distance from the Sun…

A: Given, Speed of light 1.17*10^7 miles per minute Average distance between sun and Pluto is 3.67*10^9…

Q: Why does the U.S. often launch from the east coast of Florida?

A: USA often launch rockets from the east coast of florida

Q: Determine the frequency of a wave of light if the wavelength is 6.24 x 10-9m. O 8.4 x1016 Hz O 1.9…

A: The relation between the wavelength and the frequency is  frequency = speed of lightwavelength

Q: If light of frequency 200,000,000 vib/s from a star is observed to have a frequency of 188,000,000…

A: f0 is the observed frequencyf is the source frequencyv source velocityc is the speed of light…

Q: With the sun directly​ overhead, an airplane takes off at a speed S of 235 mph at an angle θ of 17°…

A: Given  Speed of the airplane is v=235 mph Angle of the airplane with the horizontal is θ=17°   We…

Q: radio transmitter broadcasts at a frequency of 139kHz. What is the wavelength of the wave? ( speed…

A: Frequency = 139 kHz   = 139000 Hz  Speed of light = 3 × 108 m/s

Q: you were traveling away from a planet at 99% the speed of light, and turned on a flash light…

A:

Q: The Hubble Space Telescope is in low-Earth orbit. What is the magnitude of stellar aberration…

A: 1) See, By taking the spectrum of a distant object, such as a galaxy, astronomers can see a shift in…

Q: What is the distance light travels in one year?

A: Given:  time = 1 year  speed, c = 3 x 108 m/s

Q: How do stars move at the north / south pole, at the Earth's equator, and at different latitudes…

A: Stars are the heavier mass objects in the space around which small planets are revolving in…

Q: Light from the Sun reaches us in nearly A. 2 minutes B. 4 minutes C. 8 minutes D. 16 minutes

A: Introduction: The distance of the sun from the Earth is 1.49x108 km. The speed of the light is 3x108…

Q: - If the angular height of a body is 22.45 degrees, then the azimuthal dimension is 77.15 76.55…

A: Angular height=22.45degrees Azimuthal dimension=?

Q: Speed = distance / time.  The letter "c" is used to represent the speed of light. c = d / t…

A:

Q: UNT has a radio station broadcasts at FM 88.1 MHz.  The radio wavelength is _____ meter

A: radio frequency is f = 88.1 MHz = 88.1 Mega Hertz = 88.1 x 106 Hertz = 88.1 x 106 Hz

Q: A satellite placed in a circular orbit at a radius of 1.5 earth radii (z ~ 3,185 km) has an orbital…

A: Given that: Radius of orbit: r=1.5Re=1.5×6370×106 mSatellite must be atleast 15° above horizontal to…

Q: If you see a red-hot star, you can be certain that its peak intensity is in the infrared region. Why…

A: The red hot star

Speed of light

The speed at which the light travels in a vacuum is unbiased for both the source and inertial frame of reference of the observer. This was postulated by the physicist, Albert Einstein, by observing the theory of electromagnetism of Maxwell. Also, there was no evidence for the luminiferous aether, that is, the medium for the propagation of light where the electromagnetic field exists.