When astronomers look at the spectrum of the Sun, they noticed that the light from one edge is slightly blue-shifted, while light from the opposite age is slightly red-shifted. What does this tell you about the Sun?

Q: Why Sun is Yellow?

A: Sun emits most strongly in the green-yellow-red part of the spectrum. And if  green is added to red,…

Q: The brightest star in the constellation Lyra is the bluish star Vega, whereas the brightest star in…

A: The Wein’s displacement law states that the temperature is inversely proportional to the wavelength.

Q: What wavelength (in nanometers) is the peak intensity of the light coming from a star whose surface…

A: Determine the wavelength of the light.

Q: As an object is heated, the peak in its thermal emission spectrum may shift out of the visible part…

A: According to Wien's displacement law λT=a constant

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: Give the fundamental equations that describe the link between a blackbody's temperature, wavelength,…

A: In physics,the blackbody is the surface which absorb all radiant frequency falling onto it.

Q: The surface temperature of a star is about 10,000 K.  Use this to calculate the total energy…

A: Given data The surface temperature of a star is Ts = 10000 K The radius of the star is Rstar = 2.5 x…

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

A:

Q: The continuous-spectrum radiation that a blackbody emits is called A. Emitting light. B. Ultraviolet…

A:

Q: Earth tugs the sun around as it orbits, but it affects the radial velocity of the sun by only 0.09…

A:

Q: A bright blue star is moving away from Earth. Which of the choices best completes the following…

A: A bright blue star is moving away from Earth. Answer option A Absorption ,Red shifted

Q: An astronomer discovers a star that has a peak wavelength of 617 nm.

A: For frequency Speed = frequency × wavelength c = f× λ 3× 108 =f x 617 × 10-9 4.8× 1014 Hz = f

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: If the wavelength of the sun's ray is 0.5 micro meter (um), find its frequency. Take the speed of…

A: Given, the wavelength of sunray is 0.5 micrometer sped of light is 3x 10^8 m/s let frequency is f Hz

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: The surface temperature of a class O blue-white star is around 40 *10^3 K. At what frequency will it…

A: Given data: Surface temperature of class O blue-white star is, T=40×103 K.

Q: A star’s spectrum emits more radiation with a wavelength of 690.0 nm than with any other wavelength.…

A: Wavelength = 690 nm Radius of star = 7.20 × 108 m It is given as a condition that the star is 9.78…

Q: Gives a fundamental and principles as well as the equation of solar energy and absorption of…

A: Fundamentals of solar energy: When the sun shines upon a solar panel, energy from the sunlight is…

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

A:

Q: Describe the ultraviolet catastrophe and how it shaped scientists’ understanding of light.

A: Reyleigh Jeans law which was derived using classical mechanics predicted that an ideal blackbody at…

Q: A star has the peak of its blackbody spectrum occur at a wavelength of 284 nm. What is 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: What is the color of the stars shown on the diagram that have the lowest surface temperature? O red…

A: Required: Color of the stars,

Q: Human body temperature is about 310 K. At what wavelength do humans radiate the most energy?  In…

A: According to Wien’s displacement law, λmax=bT       (I)          b=Wiens displacement…

Q: You take a spectrum of Rotor from Earth and compare it to a spectrum of the Sun (see Figure 1).…

A: The spectrum of Rotor is observed from the earth, and some spectral lines corresponding to A, B and…

Q: A blackbody radiator in the shape of a sphere has a surface area of 152 If it has a temperature of…

A: Given quantities: Temperature of the radiator (T) = 1200 K Surface area of the sphere (A) = 15 cm2…

Q: 18. A star has its surface temperature of around 10000 K. Find the wavelength of the most intense…

A:

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: If a star gives off light at a peak wavelength of 6.80x10-7 m. What would be the temperature of this…

A: Given peak wavelength = 6.8×10-7m

Q: A photon of wavelength of 1400Å is absorbed by an atom and two other photons are emitted. If one of…

A:

Q: A blue-hot star is about twice as hot as a red-hot star. But the temperatures of the gases in…

A:

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: According to present theories of light, in some experiments light seems to be:

A: according to present theory of light .  light can behave like a particle as well as wave

Q: A blackbody measures 20 cm by 15 cm. If the temperature of the object is 2,500 K, how much energy…

A: The given values are,

Q: A star's spectrum has intense absorption lines at wavelengths characteristic o

A: The correct option is " G spectral type "

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: If the blue and orange light of a black body were blocked what colors would now be present in the…

A: blue and orange light of a black body were blocked

Q: If you observe a star’s blackbody spectrum twice, once from Earth and once from a space shuttle…

A: When radiation passes through any sample of gas, the atoms get excited by absorbing that particular…

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.