A blue-hot star is about twice as hot as a red-hot star. But the temperatures of the gases in advertising signs are about the same, whether they emit red or blue light. What is your explanation?

Q: During a nuclear explosion, the core of the explosion reaches temperatures of about 10,000,000 K.…

A: We know that  wiens law   λmax = b / T b = 2.897×10−3 m⋅K T = Absolute temp in  K λmax = peak wave…

Q: Infrared observations of a star show that the star is most intense at a wavelength of 280 nm. What…

A: Write the expression for Wien’s law. λmaxT=2.898×10-3 m·KT=2.898×10-3 m·Kλmax

Q: If atoms of a substance absorb ultraviolet light and emit red light, what becomes of the missing…

A: The missing energy may become light of other colors or invisible infrared light.

Q: or an advanced lab project. you are studying an unknown hydrogen-like atom. For these atoms. you…

A:

Q: Suppose you are working with a photosensitive material that you know is sensitive to green light,…

A: Required : Which light is will damage the material.

Q: 5.3 The surface temperature of the Sun is 5800 K about and measurements of the Sun's spectral…

A:

Q: What do you understand by the invisible spectrum?

A: The visible spectrum of light consists of 7 colors. i.e. Violet, Indigo, Blue, Green, Yellow, Orange…

Q: the glowing gas cloud shown below contains mostly hydrogen excited to emit photons. What kind of…

A: The above figure is an example of emission nebula, which are formed as a result of the interaction…

Q: Choose the correct statements concerning the elec- tromagnetic spectrum given off by stars. (Give…

A: Explanation- As the temperature of an object increases two things happen; higher energy photons are…

Q: the black body radiation emitted from a furnace peeks at a wavelength of 6.4 X 10^-6 m (0.0000064 m)…

A:

Q: Firefly bioluminescence has a peak wavelength of around 600nm. From Wien’s blackbody radiation…

A: Given: The peak wavelength (λpeak) = 600 nm.

Q: Describe what happens to the blackbody spectrum as you increase or decrease the temperature. What…

A: Blackbody spectrum.

Q: An incandescent light bulb and thin gas cloud are in space. From which point of view would an…

A:

Q: If 9.6 ev is created, what is the frequency of the energy wave generated?

A: The energy of the wave is given as E = 9.6 eV.

Q: If you see a “violet-hot” star, you can be certain its peak intensity is in the ultraviolet range.…

A: Objects start to glow red at about  . As they get hotter, they will appear orange, yellow, white and…

Q: How does an absorption spectrum differ in appearance from an emission spectrum?

A:

Q: X-ray radiation has wavelengths from 1.0×10-11 to 1.0×10-8 m, whereas the wavelength region for…

A: Given Wavelength of X-ray radiation = 1.0×10-11 to 1.0×10-8 m Wavelength of ultraviolet radiation =…

Q: A high-pressure gaseous object (e.g. the sun) will emit a consisting a wide range of wavelengths. *…

A: Given:  A high pressure gaseous object like sun A band of of waves which is in increasing or the…

Q: Which of the statement describes about "Ultraviolet Catastrophe"? A. Rayleigh-Jeans wavelength B.…

A: The ultraviolet catastrophe, also called the Rayleigh–Jeans catastrophe It was the prediction of…

Q: temperature of an object resembling a blackbody is raised from 10 K to 300 K. How much does the…

A: According to Stefan-Boltzmann law, the total radiant energy(E) emitted from an object is…

Q: The hydra constellation in a distant sky island is moving away from Earth at a velocity of 6.12 ×…

A: Please see the answer in Step 2

Q: The type of light that can be emitted when one electron orbiting a hydrogen atom drops down in its…

A:

Q: What kind of spectrum is shown below?     a. black hole spectrum   b. continuous spectrum   c.…

A: absorption line spectrum:   an electromagnetic spectrum in which a decrease in intensity of…

Q: Why won’t a very bright beam of red light impart more energy to an ejected electron than a feeble…

A: Violet has more frequency than red .Energy of electromagnetic radiation is directly proportional to…

Q: The visible spectrum—that is, light that we can see with our eyes is? Pick one answer.     A. is…

A: The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human…

Q: The visible spectrum of sunlight shows a range of colors from red to violet. This spectrum has…

A: There exists cooler gas on the exterior of the Sun. Dark lines in the spectrum of light from the Sun…

Q: A mercury vapour lamp emits in the green portion of electromagnetic spectrum at a wavelength of…

A: Given that Wavelength (λ)=546.1 nm bandwidth△ν =6×108 Hz Coherence length is given by L=c△tL=c△νWe…

Q: Ultraviolet light causes sunburn whereas visible light even of greater intensity, does not? Why is…

A: Ultraviolet radiation is the main cause of sunburns. They can change the DNA in skin cells directly.…

Q: Why was helium discovered in the sun’s spectrum before being observed on Earth? Why was hydrogen…

A: The spectrum from the sun was observed to have a bright yellow line in it and this line was earlier…

Q: A very bright source of red light has much more energy than a dim source of blue light, but the red…

A: Red light and blue light

Q: If you pass sunlight through a spectroscope you will see a(n)______________spectrum which can tell…

A:

Q: Elements at the Sun's surface are revealed in the solar spectrum. Are the lines in the spectrum…

A: Elements of the Sun’s surface are revealed in the solar spectrum.

Q: Which of the following is a feature of blackbody emission spectra? A. The spectrum is discrete B.…

A: Black body emission spectra is a continuous and observed in ultaviolet, visible and infrared region.…

Q: What is the temperature of an object if the peak wavelength of its blackbody spectrum is 1200…

A: The Wien's law can be written as, λmT=2898 μm·K

Q: Types of Spectra" pg. 63, question 2 Vhat type of spectrum is produced when the light emitted…

A: When light emitted directly from a hot dense object travels through the prism, it produces a…

Q: Two stars, both of which behave like ideal blackbodies, radiate the same total energy per second.…

A:

Q: 10. Of the available choices, the color most energetic. has the shortest wavelength and is the a.…

A:

Q: Ultraviolet (UV) paint will absorb ultraviolet light and re-emit it at a longer wavelength. O is…

A: We need to choose the correct option for UV paint.

Q: When astronomers look at the spectrum of the Sun, they noticed that the light from one edge is…

A:

Q: Since every object has some temperature, every object radiates energy. Why, then, can’t we see…

A: Every object radiates energy

Wien's displacement law

Students often get confused between Wien's displacement law and Planck's radiation law. Although both are historically related, yet they are conceptually different. Planck's law helps determine the spectrum of a blackbody, while Wien's law determines the relationship between peak wavelength and temperature.