How do we define the time interval of one "second" now, and keep track of elapsed time accurately enough to navigate spacecraft through the solar system, or place you on Earth with a GPS receiver? O Counting cycles of oscillation in a cesium atom, the so-called "atomic" clock. From the daily rotation of the Earth on its axis. From the daily rotation of Earth with respect to distant stars. From the annual revolution of Earth about the Sun starting at noon on one year and ending at noon on the following year.

How do we define the time interval of one "second" now, and keep track of elapsed time accurately enough to navigate spacecraft through the solar system, or place you on Earth with a GPS receiver? O Counting cycles of oscillation in a cesium atom, the so-called "atomic" clock. From the daily rotation of the Earth on its axis. From the daily rotation of Earth with respect to distant stars. From the annual revolution of Earth about the Sun starting at noon on one year and ending at noon on the following year.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Stellar evolution

We may see thousands of stars in the dark sky. Our universe consists of billions of stars. Stars may appear tiny to us but they are huge balls of gasses. Sun is a star of average size. Some stars are even a thousand times larger than the sun. The stars do not exist forever they have a certain lifetime. The life span of the sun is about 10 billion years. The star undergoes various changes during its lifetime, this process is called stellar evolution. The structure of the sun-like star is shown below.

Red Shift

It is an astronomical phenomenon. In this phenomenon, increase in wavelength with corresponding decrease in photon energy and frequency of radiation of light. It is the displacement of spectrum of any kind of astronomical object to the longer wavelengths (red) side.

Question

How do we define the time interval of one "second" now, and keep track of elapsed time accurately enough to navigate spacecraft through the solar system, or place you on Earth
with a GPS receiver?
Counting cycles of oscillation in a cesium atom, the so-called "atomic" clock.
From the daily rotation of the Earth on its axis.
From the daily rotation of Earth with respect to distant stars.
From the annual revolution of Earth about the Sun starting at noon on one year and ending at noon on the following year.
O O O O

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