A dust cloud with constant opacity,
Q: At what wavelengths do stars of surface temperates 20 000 K, 10 000 K, and 3000 K have their peak…
A: Given temperatures as below :- Temperature (T) = 20000 K. Temperature (T) = 10000 K. Temperature (T)…
Q: Briefly explain about any five physical properties of CNTS along with their potential applications.
A: First of all, we need to understand what is CNT . The full form of CNT is carbon nanotube. Now it…
Q: Soft magnets are materials, in which the process of O a. demagnetization is done easily, but…
A: Soft magnetic materials are those materials which have a smaller area enclosed by their hysteresis…
Q: What is therate of thermal radiation emittedfrom a star witha radius of 2.310x 109mand a surface…
A:
Q: Bootes is a double star system whose components are separated by 2.9 arcsec. Calculate the linear…
A: Note that here we used the fact that the diameter of new technology telescope(NTT) is 3.58 m which…
Q: Two stars of the same diameter or observed to have surface temperatures of 4000 Kelvin and 16,000…
A:
Q: For this question, let's assume all types of EM radiation are unobscured by galactic gas & dust. We…
A: The resolving power of any telescope is the ability of a telescope to resolve closer and smaller…
Q: A) What is Event Horizons telescope?
A: The Event Horizon Telescope is an international network of radio observations that helps to capture…
Q: The dust in a molecular cloud has a temperature of about 34 K. At what wavelength (in nm) does it…
A: temperature = T = 34 K wavelength = λmax=?
Q: if a light source is not spherical, How does this affect calculations of luminosity? Do you expect…
A: Lumisosity is independent of an observer's distance from an object.It is an absolute measure of…
Q: Soft magnets are materials, in which the process of a. magnetization is done easily, but…
A: Explanation: Soft magnetic materials are those materials that are easily magnetized and…
Q: The belief was that the hottest stars would have the strongest absorption signatures. This was later…
A: To produce an H absorption line , the electron of the hydrogen should be in excited state. This…
Q: The sun is the only star whose size we can easily measure directly; astronomers therefore estimate…
A: Given, Photon Energy =2.4eVWe know the term Luminosity, The term, Luminosity is an absolute measure…
Q: Interstellar dust is found to be at a temperature of 1000 K. At what wavelength will be the…
A: Interstellar dust is formed from dying stars. During supernova explosions, the outer layer of the…
Q: The luminosity density of an accretion disk, which extends from riso to rmax, is given by the…
A:
Q: Which telescope will be able to see fainter images, Keck or HST
A: The Keck Observatory is two telescope based astronomical observatory on the summit of Mauna Kea. It…
Q: Should a fire (T = 1000 K) emit more radiation at 5 micron wavelength or at 15 micron wavelength?…
A:
Q: The blackbody emission spectrum of object A peaks in the ul- traviolet region of the electromagnetic…
A: A blackbody is a hypothetical body that is capable of absorbing all the radiation that falls on it.…
Q: The charge flowing for two minutes in a wire of 102 when 20V is applied across the wire is [ ] a)…
A:
Q: Nickel is a material in which the process of O a. magnetization is done easily, but demagnetization…
A: Answer a. magnetization is done easily, but demagnetization is difficult
Q: An electron volt is by definition the kinetic energy gained by an electron if it is accelerated…
A: Note :- Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the…
Q: A powerful telescope can observe an object down to about the 30th magnitude in the B-band. To what…
A: Given:- A powerful telescope can observe an object down to about the 30th magnitude in the B-band.…
Q: Interstellar extinction dims starlight by about 1 magnitude per 1000 pc. What fraction of photons…
A: The apparent visual magnitude of star is changed by 1 magnitude, produces a flux ratio of fifth…
Q: radio lines of neutral Hydrogen (apart from H91α) What does H91α meaning for?
A: Introduction: The Balmer series is the name given to a series of spectral emission lines of the…
Q: If the hottest star in the Carina Nebula has a surface temperature of 51,000 K, at what wavelength…
A: Concept: "The Wien's displacement law states that the wavelength carrying maximum energy is…
Q: 4) Why infrared is preferred to observe the stars around Sgr A*?
A: There are molecules of gas and dust in interstellar space. They are sent out when a star dies.…
Q: The galaxy NGC 4414 is moving away from us at 7.16x105 m/s. By how much will the frequency of the…
A: Given, the velocity of a galaxy is u=7.16×105m/s the central frequency of the Hydrogen line is…
Q: Why are the Hll regions around 0 stars generally larger than those around B stars?
A: HII region is the interstellar region where atomic hydrogen is ionized. It is a cloud of partially…
Q: The dust in a molecular cloud has a temperature of about 50 K. At what wavelength does it emit the…
A: A blackbody is an ideal object that absorbs all the radiation that falls on it. The blackbody then…
Q: Besides using the peak wavelength emitted in its blackbody curve, how can a star’s spectrum tell you…
A: Introduction: A blackbody is a theoretical or model body that absorbs all radiation falling on it,…
Q: 100 km s¹. Calculate the ruling density necessary to observe the Hydrogen- 3 emission line at the…
A: The wavelength of the hydrogen-B emission line is 4861 Angstroms. The line would be dispersed across…
Q: During a free-fall collapse, a molecular cloud contracts, fragmenting into pieces. Each fragment…
A:
Q: The life cycle of a star in order (rearrange the steps below.) In the nebula, compact pockets of…
A: The correct order of the life of a star is listed below :
Q: Soft iron is a material, in which the process of O a. magnetization and demagnetization is difficult…
A: Here, we have to discuss the property of Soft iron.
Q: Two identical stars are moving in a circular orbit around one another with an orbital separation of…
A: The Hubble Space Telescope or HST is a space telescope placed in the low Earth orbit. It has a 2.4 m…
Q: In a star’s core the average mass number for ions which are not hydrogen or helium is 10. The mass…
A: Assuming the abundance of different element per unit mass is X, Y and Z for hydrogen, helium and all…
Q: What cause the unstability of perovskite solar cells and How do scientsits deal with this problem?
A: Perovskite solar cells (PSCs) belongs to a new class of semiconductor devices that comprises the…
Q: In this problem, we derive the mass luminosity relation. There are three equations to be looked at.…
A:
Q: Two identical stars are moving in a circular orbit around one another, with an orbital separation of…
A: An orbital separation of two identical stars, s=2 AU=2 AU×1.5×1011 m1 AU=3×1011 m The distance of…
Q: Why are Balmer lines strong in the spectra of medium-temperature stars and weak in the spectra of…
A: Spectral lines are formed when electrons inside an atom make a transition between energy levels.…
Q: Using Wien's Law for two black body objects with a temperature of 1000 K (fire) and 290 K…
A:
Q: Use the small-angle formula to find the linear diameter of a radio source with an angular diameter…
A: Given :- angular diameter of radio source = 0.0024 arc seconds. distance = 2.30 Mpc .
Q: A radio broadcast was made in 1913. Since that time until 2011, how far has that radio broadcast…
A: The radio waves in a radio broadcast travel at the speed of light, that is 300,000 km/sec. So if the…
A dust cloud with constant opacity, and a diameter of 1pc, absorbs 50% of the light that passes through it. How thick must the could be in order to absorb 90% of the light that passes through?
Trending now
This is a popular solution!
Step by step
Solved in 3 steps