Why does a fireplace poker appear black when not in the fire and red, yellow, or white when left in the fire?

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: Based on the text you read, showing that electrons can behave like waves?

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Q: Why does a sample such as hydrogen have 4 discrete lines of color instead of a blurry, continuous…

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Q: not an application of photoelec O a. in chromatiser O b. in television camera O c. in solar…

A: Option a ) Chromatiser   Photoelectric effect s not used in chromatiser  In chromatiser adsorption…

Q: Why can atoms be seen with an electron beam?

A: The atoms can be seen with an electron beam because their size is larger than the wavelength of an…

Q: What would you get if you mix M, Y, and C lights?

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Q: All objects radiate energy. Why, then, are we not able to see all the objects in a dark room?

A: All the objects emit electromagnetic radiation. Our eyes can see visible lights only, which have…

Q: We usually associate fluorescence with ultraviolet light— objects glow under “black light.” But it’s…

A: We usually associate fluorescence with ultraviolet light objects glow under "black light" But it's…

Q: Is it necessary that that every black coloured objects should be considered a blackbody?

A: A perfect black body is a body that absorbs all the radiation that falls on it.

Q: Which of the following statement is correct about a photon? (Is the answer I selected correct?)…

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Q: How do the avalanches of photons in a laser beam differ from the hordes of photons emitted by an…

A: Avalanche photons which are emitted by a laser beam is coherent and narrow range of wavelength (non-…

Q: The purpose of choke in tube light is?

A: When the switch is ON, in a tube light choke is nothing but the coil/ballast ( inductor) which is…

Q: Which has the greatest energy- a photon of infrared light, of visible light or of ultraviolet light?

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Q: Discuss the property of optical activity of certain materials.

A: When a chiral molecule tend to rotate the plane of plane-polarized light passing through it by means…

Q: Name five salient features of a stationary anode X-ray tube.

A: Answer: Salient features of stationary anode x-ray tube: (1) Poor heat loading, (2) Low powered…

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

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Q: Some doors have spring and damper combinations so they close slowly when released. How is this…

A: Phosphorescence is the emission of light from a substance exposed to radiation and persisting as an…

Q: Why does a sodium street lamp give off a different color light than a neon light?

A: Sodium street lamp gives off yellow color, while a neon light gives of a red color.

Q: Why is the photoelectric effect always accompanied by a secondary process.

A: Quantum mechanics is a field of physics that studies the behavior of small microscopic particles and…

Q: We speak of photons of red light and photons of green light. Can we speak of photons of white light?…

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Q: If we continue heating a piece of initially room-temperature metal in a dark room, it will begin to…

A: The metal glows at any temperatures, but it can be clearly visible to human eyes when it reaches in…

Q: Why at night, under the mercury or sodium vapor lights in a mall parking lot, do cars seem to be…

A: Color rendering index (CRI):It is defined as the measurement of the ability of light source to…

Q: Have you ever watched a fire and noticed that the burning of various materials often produces flames…

A: The color of the flame depends on several factors, and the most important among them are black body…

Q: Discuss in brief the path of light through a droplet.

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Q: If a metal exhibits the photoelectric effect when green light is shone on it, what happens if violet…

A: When radiations are incident on a metal surface, photoelectrons are emitted from it. This effect is…

Q: Which has more energy—a photon of visible light or a photon of ultraviolet light?

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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 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: Why do photographs in a book or magazine look grainy when magnified?

A: The photograph look grainy means that has a rough appearance as if the images are made up of spots

Q: When ultraviolet light shines on glass, what does it do to electrons in the glass structure?

A: Ultraviolet light is the light having wavelength less than the violet color's wavelength. It has…

Q: explains the photoelectric effect.

A: In this question we have to explain the photoelectric effect. Please give positive feedback if the…

Q: Why can atoms not be seen with a powerful optical microscope?

A: Atoms cant been seen with an optical microscope because the size of the atoms is smaller than the…

Q: Sunlight, considered to be white, actually appears to be a bit yellow. Why?

A: The phenomenon in which the light rays deviates from its original straight path by striking  on…

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

A: Every object radiates energy

Q: Objects that glow in the dark can be based on: Group of answer choices a)fluorescence. b)laser.…

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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.