For a blackbody object of given volume, which shape will it emit the least radiation? Why?

Q: Consider an opaque body capable of absorbing red light and illuminated by: Yellow light

A: given: body absorbs = red light (R) illuminated by   = yellow light  (Y)

Q: How does the frequency of a particular spectral line observed in sunlight compare with the frequency…

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Q: What will happen to the object which will be less denser than water? more denser than water?

A: Step 1Density is defined as mass possessed by an object in a specified volume.

Q: of illumination emitted by the sun at the greatest wavelength λmax = 0.5 pm and the greatest…

A: Given values:- Amount of illumination emitted at the greatest wavelength,(λmax)=0.5 pm -----(1)…

Q: A quartz prism is required for obtaining the spectrum of the ultraviolet light?

A: Glass is a good absorber of ultraviolet radiation. When the light rays are passes through normal…

Q: How are Ultraviolet waves produced?

A: Ultraviolet radiation is generated naturally from the Sun and artificial sources such as…

Q: Which warms more quickly in sunlight- a colorless or a colored piece of glass? Why?

A: A colored glass can absorb all the colors except its own color while the colorless glass can't…

Q: what part of the electromagnetic spectrum is most absorbed by water?

A: A material absorbs light when the natural frequency of oscillation of that material matches with the…

Q: Discuss the scientific properties of why the sky is blue.

A: The blue color of sky:

Q: Why does the color of a surface affect emissivity?

A: Emissivity of the surface of a colored body is the body's effectiveness to radiate thermal energy.…

Q: Name the material of prism required for obtaining the spectrum of (a) ultraviolet light (b) infrared…

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Q: could a light bulb approximate a blackbody?

A: Black body absorbs radiation of all wavelength which are incident on it. Black body does not reflect…

Q: Why does a good emitter of heat radiation appear black at room temperature?

A: A good emitter of heat radiation appears black at room temperature because good emitters are having…

Q: Based on your observation, what is the direction of the circulation of red food color? blue food…

A: As the heart beats, it pumps blood through a system of blood vessels called circulatory system.…

Q: It is hotter at the same distance over the top of a fire than in front of it, Why?

A: Whenever we put fire at a place, the air surrounding the fire gets heated up. As we know that hot…

Q: ?Which of the following statements is TRUE Visible light takes up all of the electromagnetic…

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Q: When does light behave as a wave? When does it behave as a particle?

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Q: If the wavelength of light is halved, by what fraction does the amount of the light scattered by…

A: Write the expression for the intensity of the light by Rayleigh’s law of scattering. I∝1λ4

Q: Which travels faster through a vacuum - an infrared ray or a gamma ray?

A: Infrared and gamma rays are electromagnetic waves. So they travel at 3×108m/s in vacuum.

Q: When something is painted red, what color is most absorbed?

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Q: Fig. 6.1 shows apparatus that is used to demonstrate some effects of the transfer of energy by…

A: In the given experiment: We need to conclude: (a) Two types of radiation (b)  The reason behind…

Q: When the "full" moon rises, the color is yellowish while its color directly overhead is white.  Why?

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Q: What is radiation spectrum?

A: The entire range of electromagnetic radiation, including  radio waves, microwaves, infrared…

Q: s blocked by the black shap is used?

A: When light travel into a medium with a higher index of refraction, the light bends towards the…

Q: Which of the following colors indicates an object of the lowest temperature? (A) Violet (B) Blue (C)…

A: Answer:- (B) Blue    Blue colors indicate an object of the lowest temperature.    Because    In any…

Q: A body with large reflectivity is a poor emitter, Why?

A: According to Kirchhoff's law, a poor absorber of heat is a poor emitter. Hence, a body with large…

Q: Choose the BEST answer to the following: A high-temperature source radiates relatively (a) short…

A: Step 1Let f is the frequency and T is the temperature, then it is known that

Q: Which have shorter wavelengths, ultraviolet or infrared? Which has the higher frequencies?

A: Ultra-violet radiation has shorter wavelength. They have a wave length range of 1 nm to 400 nm…

Q: Why will body emit more radiation under similar conditions, a black body or a polished body?

A: According to the Stefan-Boltzmann law, the energy radiated is

Q: Why does a body emit radiations of all wavelengths and not for a particular wavelength?

A: Wavelength – When we consider a point on a single wave, then the measurement of the distance between…

Q: Why are infrared rays often called heat waves?

A: When infrared rays fall on object, they cause entire atoms and molecules to vibrate. And due to…

Q: If the sunlight were somehow green in color instead of white, what color clothing would be advisable…

A: Since green color will absorb all color frequencies except green so when sunlight of green color…

Q: Why the colour of the sky is blue?

A: When sunlight passes through the atmosphere, the fine particles in the air scatter the blue color…

Q: What is ultraviolet light?

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Q: Which of the following is true about light?

A: Light acts as a particle and wave at the same time. In quantum mechanics, wave and particle has dual…