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Chapter 31: Problem 28

How long does it take light to travel from the Moon to the Earth? From the Sun to the Earth? From Jupiter to the Earth?

Short Answer

Expert verified
Answer: It takes approximately 1.28 seconds for light to travel from the Moon to Earth, about 8 minutes and 19 seconds from the Sun to Earth, and around 34 minutes and 55 seconds from Jupiter to Earth when they are closest.

Step by step solution

01

Calculate time for light to travel from the Moon to Earth

Using the distance between Earth and the Moon (384,400 km) and the speed of light (300,000 km/s), use the formula time = distance/speed: time = 384400/300000 time 鈮� 1.28 seconds It takes roughly 1.28 seconds for light to travel from the Moon to the Earth.
02

Calculate time for light to travel from the Sun to Earth

Using the distance between Earth and the Sun (149,600,000 km) and the speed of light (300,000 km/s), use the formula time = distance/speed: time = 149600000/300000 time 鈮� 498.67 seconds It takes roughly 498.67 seconds, or about 8 minutes and 19 seconds, for light to travel from the Sun to the Earth.
03

Calculate time for light to travel from Jupiter to Earth

Using the distance between Earth and Jupiter when they are closest (628,700,000 km) and the speed of light (300,000 km/s), use the formula time = distance/speed: time = 628700000/300000 time 鈮� 2095.67 seconds It takes roughly 2095.67 seconds, or about 34 minutes and 55 seconds, for light to travel from Jupiter to the Earth when they are closest. Note that the time will be longer when Earth and Jupiter are farther apart.

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Most popular questions from this chapter

The current flowing in a solenoid that is \(20.0 \mathrm{~cm}\) long and has a radius of \(2.00 \mathrm{~cm}\) and 500 turns decreases from \(3.00 \mathrm{~A}\) to \(1.00 \mathrm{~A}\) in \(0.1 .00 \mathrm{~s} .\) Determine the magnitude of the induced electric field inside the solenoid \(1.00 \mathrm{~cm}\) from its center.

Two polarizers are out of alignment by \(30.0^{\circ} .\) If light of intensity \(1.00 \mathrm{~W} / \mathrm{m}^{2}\) and initially polarized halfway between the polarizing angles of the two filters passes through the two filters, what is the intensity of the transmitted light?

A laser beam takes 50.0 ms to be reflected back from a totally reflecting sail on a spacecraft. How far away is the sail?

The wavelength range for visible light is \(400 \mathrm{nm}\) to \(700 \mathrm{nm}\) (see Figure 31.10 ) in air. What is the frequency range of visible light?

Practically everyone who has studied the electromagnetic spectrum has wondered how the world would appear if we could see over a range of frequencies of the ten octaves over which we can hear rather than the less than one octave over which we can see. (An octave refers to a factor of 2 in frequency.) But this is fundamentally impossible. Why?
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