If you see a “violet-hot” star, you can be certain its peak intensity is in the ultraviolet range. Why is this?

Q: The wavelength of red light in a spectrum is about 0.0000007 meters. Which number best approximates…

A: Given that wavelength of red light spectrum is 0.0000007 meters This is approximated by the number…

Q: The normal human body temperature is T= 310 K. At what wavelength would humans emit the blackbody…

A: Wein's Law says that different objects at different temperatures emit different wavelength peaks. It…

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: What can be said about the relative temperatures of whitish-yellow, reddish, and bluish stars?…

A: Bluish stars are the hottest among the stars.

Q: Find the power per unit area radiated from the sun’s surface in the wavelength range 500.0 to 505.0…

A:

Q: A distant star has a peak wave length of 0.00000081 meters.  What is the temperature of that star?

A:

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

A:

Q: What can you say about the x-ray spectra?

A: A German physicist, Wilhelm Roentgen discovered x-rays in 1901. For discovery of x-rays he won Nobel…

Q: ultraviolet radiation becomes more dangerous as the wavelength decreases. the ultraviolet radiation…

A: Given  Wavelength = L= 1.0*10^(-7) m  Freq = f = 3.0*10^(15) Hz  Velocity =v =????

Q: The wavelength of a photon determines its (select two answers) Brightness Speed Color Energy

A: Solution

Q: Identify the photon in each pair with the greater energy.a. orange light or violet lightb. infrared…

A: The photon is an exchange particle between different electromagnetic radiations. Planck's quantum…

Q: Human eyes are best equiped to see light which is in the yellow-green part of the spectrum because…

A:

Q: The longest wavelength within the visible spectrum is what light?

A: When a light passes through a prism, the wavelengths separate into the 7 colours of the as each…

Q: Why is a red-hot object cooler than a white-hot one of the same material?

A:

Q: The human eye is most sensitive to light of wavelength 5.50 x 10^-7 m which is the green yellow…

A: Given :     Wavelength of green yellow region, λgy = 5.5×10-7 m               This wavelength…

Q: Materials/objects 1. Radio 2. Microwave 3. Infrared 4. Visible 5. Ultraviolet 6. X-ray 7. Gamma ray…

A: The electromagnetic spectrum is the entire distribution of electromagnetic radiation according to…

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: How do the surface temperatures of reddish, bluish, and whitish stars compare?

A:

Q: How is Ultraviolet Light used?

A: UV radiation is widely used in industrial processes and in medical and dental practices for a…

Q: Which of these photons has the biggest energy?     Visible.   All have the same.   Microwave…

A: Introduction: The energy of an electromagnetic wave is inversely proportional to the wavelength of…

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: 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 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: Why does light striking a metal surface eject only electrons, not protons?

A: Electrons take less energy to come out of the metal. Electrons move freely in a metal.

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: In what part of the EM spectrum would a photon of energy 9.5 ✕ 10−23 J be found

A: Write the expression for the energy of a photon of electromagnetic radiation.

Q: The blackbody radiation emitted from a furnace peaks at a wavelength of 4.9 10-6 m (0.0000049 m).…

A:

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

A:

Q: The wavelength of the peak of the blackbody distribution was found to follow Wein’s Displacement…

A:

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

A:

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: A hot object may radiate Group of answer choices infra red wave ultraviolet wave visible light wave…

A: A hot object radiates electromagnetic waves of higher frequency.

Q: 3. In the He+ ion, which transition results in UV emission? 4. In the He+ ion which transition…

A: 3. The Lyman series in the H-atom spectrum is known to be in the UV region of the Electro Magnetic…

Q: 400 600 800 1000 1200 Wavelength (nm) The following question refers to the above diagram showing the…

A:

Q: Why do lines in the emission and absorption spectra appear at the same wavelength?

A: An atom absorbs light energy and uses this imbided energy to excite its outermost electrons to…

Q: If the average temperature of the surface of the Sun is roughly 5780 Kelvin, the radiation emitted…

A:

Q: The "nearest neighbors" of the visible light spectrum we may recognize as, are Group of answer…

A: The sequence of the waves in the electromagnetic spectrum arranged by increasing frequency is given…

Q: How would a spectrum help you learn what the atmosphere of Venus is made of?

A: The electromagnetic spectrum corresponding to each atoms and molecules are different. The absorption…

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.