What is a stroboscope? What is Venturi-meter? What are the precautions you should observe while doing the experiment with the vibration magnetometer? What detector is used to pick up the x-rays in hospitals? Wha
what is the Doppler effect? Explain. What is a vibration magnetometer? What is the medium for convection? Identify and describe the steps of the scientific method. What is the spin of photons? Define Lens (astronomy). Define magnification in astronomy. ...
The further away something is, the further back in time you are looking. As the universe is expanding, the light from these distant objects is stretched into longer wavelengths. This is known as the redshift, and it is the light equivalent of the Doppler effect that you can hear when vehi...
The concept of redshift and blueshift is closely related to the Doppler effect — which is an apparent shift in soundwave frequency for observers depending on whether the source is approaching or moving away from them, according to the educational websiteThe Physics Classroom. The Doppler Effect w...
(Remember that three evenly spaced transits must be observed to register a discovery.) At the smaller sizes, the absence of planets much smaller than one earth radius is due to the difficulty of detecting transits by very small planets. In effect, the “discovery space” for Kepler was ...
Because quasars put out so much power from such a small region, they can’t be powered by nuclear fusion the way stars are; they must use some process that is far more efficient. As we shall see later in this chapter, quasars were much more common when the universe was young than th...
What is ekpyrotic theory? What happened before the Big Bang? Additional resources In the beginning, there was an infinitely dense, tiny ball of matter. Then, it all went bang, giving rise to the atoms, molecules, stars and galaxies we see today. Or at least, that's what we've bee...
Astronomers use the Doppler effect to measure the frequency of light waves as an object is moving with respect to the observer. The frequency is shorter as it moves toward you, and the object shows a blueshift. If the object is moving away, it shows a redshift. This shows up in spectra...
Furthermore, we discuss from the present viewpoint how life may have originated on early Earth, the possibilities that life may evolve on such Earth-like bodies and how future space missions may discover manifestations of extraterrestrial life. This is a preview of subscription content, log in ...
What is the definition of momentum? What is Light in astronomy? What is the spin of photons? What is the difference between power and momentum? What is luminous intensity? What is meant by scattering of light? What is the unit of light intensity?