Radioactivity is a phenomenon of the spontaneous emission of?

Radioactivity is a phenomenon of the
spontaneous emission of?
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All of the above
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Last Answer : a. Pulses of 694 nm red light

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Description : What is lowest current at which stimulated emission exceeds spontaneous emission in a semiconductor laser called?

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Description : The first laser emitted ∙ a. Pulses of 694 nm red light ∙ b. A continuous red beam ∙ c. Pulses of white light from a helical flash lamp ∙ d. Spontaneous emission

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Description : Laser light is ______ emission. ∙ a. Coherent ∙ b. Stimulated ∙ c. Spontaneous ∙ d. Coherent and stimulated

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Differentiate between spontaneous and stimulated emission of light with diagram.

Description : Differentiate between spontaneous and stimulated emission of light with diagram.

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Description : Define: (i)Spontaneous emission. (ii)Stimulated emission.

Last Answer : Spontaneous emission: When the electron jumps from higher energy state to lower energy state on its own accord, the emission is known as spontaneous emission.  Stimulated emission: When the ... energy state by triggering, (supplying external energy) the emission is known as stimulated emission. 

State two points of differentiation between spontaneous emission and stimulated emission.

Description : State two points of differentiation between spontaneous emission and stimulated emission.

Last Answer : Spontaneous emission Stimulated emission Excited atoms comes to ground state on its own accord Excited atoms comes to ground state after interaction with incident photon Radiations are in ... exist Number of photons emitted are less  Number of photons emitted are more

The phenomenon of radioactivity was discovered by - (1) Marie Curie (2) Pierre Curie (3) Henri Becquerel (4) J.J Thomson

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Last Answer : (3) Henri Becquerel Explanation: In 1896 Henri Becquerel was using naturally fluorescent minerals to study the properties of x-rays, which had been discovered in 1895 by Wilhelm Roentgen.

The phenomenon of radioactivity was discovered by - (1) Marie Curie (2) Pierre Curie (3) Henri Becquerel (4) J.J. Thomson

Description : The phenomenon of radioactivity was discovered by - (1) Marie Curie (2) Pierre Curie (3) Henri Becquerel (4) J.J. Thomson

Last Answer : (3) Henri Becquerel Explanation: In 1896 Henri Becquerel was using naturally fluorescent minerals to study the properties of x-rays

The phenomenon of radioactivity was discovered by (A) Madam Curie (B) Becquerel (C) Roentgen (D) J.J. Thomson

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Last Answer : (B) Becquerel

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What source and strength of radioactivity could cause mercury dental fillings to become radioactive?

Description : What source and strength of radioactivity could cause mercury dental fillings to become radioactive?

Last Answer : answer:In general, things don't become radioactive simply by being exposed to radioactivity. (I hate to say never , because I don't know if an incredibly large radioactive burst ... think it is possible for dental fillings to become radioactive from exposure to (survivable) ionizing radiation.

Could internal conversion or ultrafast internal conversion, be artificially started in humans and create Radioactivity?

Description : Could internal conversion or ultrafast internal conversion, be artificially started in humans and create Radioactivity?

Last Answer : I’m sorry without a better explanation of the terms to which you refer, I could not venture to offer a useful answer. Please clarify!

Are there any famous scientific studies about granite emitting radioactivity?

Description : Are there any famous scientific studies about granite emitting radioactivity?

Last Answer : answer:I took an intro to philosophy class where we watched a video showing these little circles in the granite caused by the decay of radioactive materials and using it as evidence for creationism. This link ... you are concerned about. http://www.halos.com/printer.htm?page=/book/ctm-app-22-a.htm

I need a title for my science fair about radioactivity in granite. Any suggestions?

Description : I need a title for my science fair about radioactivity in granite. Any suggestions?

Last Answer : It is written in stone.

Radioactivity is measured by using the instrument?

Description : Radioactivity is measured by using the instrument?

Last Answer : Geiger counter

Unit of Radioactivity?

Description : Unit of Radioactivity?

Last Answer : Bequerrel

Natural Radioactivity was discovered by?

Description : Natural Radioactivity was discovered by?

Last Answer : Henry Bequerrel

Radioactivity is a

Description : Radioactivity is a

Last Answer : nuclear phenomenon.

What is meant by artificial radioactivity?

Description : What is meant by artificial radioactivity?

Last Answer : The process of generating radioactive isotopes during nuclear reaction is called artificial radioactivity.

What are the changes that take place during radioactivity?

Description : What are the changes that take place during radioactivity?

Last Answer : a) Charged particles energy from neutral atoms. b) An atom gets transmuted into another atom with emission of charged particles.

Basic metals can be converted into gold by ? A. Heating B. Beating C. Artificial nuclear radioactivity (Answer) D. Chemical reaction

Description : Basic metals can be converted into gold by ? A. Heating B. Beating C. Artificial nuclear radioactivity (Answer) D. Chemical reaction

Last Answer : C. Artificial nuclear radioactivity (Answer)

Copper can be converted into gold by ? A. Artificial radioactivity (Answer) B. heating C. Electroplating D. Chemical reaction

Description : Copper can be converted into gold by ? A. Artificial radioactivity (Answer) B. heating C. Electroplating D. Chemical reaction

Last Answer : A. Artificial radioactivity (Answer)

Radioactivity in the Pacific Ocean - How long can the dumping of radioactive water in Japan continue?

Description : Radioactivity in the Pacific Ocean - How long can the dumping of radioactive water in Japan continue?

Last Answer : answer:I completely agree that this turn of events makes this an international issue. I don't know if we're talking about international waters or not, but it's everyone's ocean and at this point we ... the validity of nuclear power into question. When it comes to energy, I'm very pro-green power.

Is anyone concerned about the radioactivity from the crippled (and possibly melted down) nuclear reactors in Japan?

Description : Is anyone concerned about the radioactivity from the crippled (and possibly melted down) nuclear reactors in Japan?

Last Answer : I haven’t actually thought about that. Interesting. I honestly have no idea, but all I can say is… I sure hope the radiation exposure doesn’t spread.

Into which of the following metals does radioactive Uranium decay when it loses all its radioactivity? -General Knowledge

Description : Into which of the following metals does radioactive Uranium decay when it loses all its radioactivity? -General Knowledge

Last Answer : Lead is the metal.

Who discovered radioactivity? -General Knowledge

Description : Who discovered radioactivity? -General Knowledge

Last Answer : answer:

What is radioactivity ?

Description : What is radioactivity ?

Last Answer : Radioactivity is the phenomenon in which certain elements, known as radioactive isotopes, emit energetic particles and electromagnetic radiation as they undergo decay. These emissions include alpha particles ... by human means, such as nuclear reactions, particle accelerators, and nuclear medicine.

What is Artificial Radioactivity ?

Description : What is Artificial Radioactivity ?

Last Answer : Artificial Radioactive Substances: When an element is artificially converted to radioactive elements, those elements are called artificial radioactive elements. When an element is hit by a particle of very ... are called synthetic radioactive elements or radioisotopes. E.g. , carbon , oxygen, etc.

How was the danger of radioactivity first discovered ?

Description : How was the danger of radioactivity first discovered ?

Last Answer : The dangers of radioactivity and radiation were not immediately realized. The strongest reaction to radiation was first noticed in the use of X-rays when electrical engineer and physicist Nikola Tesla ... genetic effects of radiation. He was awarded the Nobel Prize in 1948 for his discovery.

What is the unit of measurement of radioactivity ?

Description : What is the unit of measurement of radioactivity ?

Last Answer : The unit of radioactivity measure is Becquerel.

Who Discovers Radioactivity ?

Description : Who Discovers Radioactivity ?

Last Answer : Henry Becquerel discovers radioactivity.

Who is the father of radioactivity ?

Description : Who is the father of radioactivity ?

Last Answer : Henry Becquerel, the father of radioactivity

Who Discovered the Atomic Radioactivity ?

Description : Who Discovered the Atomic Radioactivity ?

Last Answer : In 1896 , the scientist Becquerel noticed this in the atom.

What is radioactivity ?

Description : What is radioactivity ?

Last Answer : Alpha , beta and gamma rays are emitted spontaneously from the nucleus of heavy elemental matter , this process is called radioactivity .

What is radioactivity ?

Description : What is radioactivity ?

Last Answer : radioactivity _ _ _ Discovering alpha particles completely through paper , beta particles through aluminum plates and gamma rays through partial resistance Stir. He observed that the nucleus ... called radioactive elements. This phenomenon of emission of radioactive rays is called radioactivity .

Who Discovered Radioactivity ?

Last Answer : Henry Becquerel, the discoverer of radioactivity.

Radioactivity Single What ?

Last Answer : radioactivity Single Curry.

A bacterium grown over medium having radiactive `.^(35)S` incorporates radioactivity in

Description : A bacterium grown over medium having radiactive `.^(35)S` incorporates radioactivity in

Last Answer : A bacterium grown over medium having radiactive `.^(35)S` incorporates radioactivity in A. Carbohydrates B. Proteins C. DNA D. RNA

The `I-128` has no therapeutic value because a.)It is poisonous b.)It is very stable c.)It decays quickly and loses radioactivity. d.)It is not radioa

Description : The `I-128` has no therapeutic value because a.)It is poisonous b.)It is very stable c.)It decays quickly and loses radioactivity. d.)It is not radioa

Last Answer : The `I-128` has no therapeutic value because a.)It is poisonous b.)It is very stable c.)It ... is poisonous C. it is radioactive D. none of these

Which of the following are correct with respect to the unit of radioactivity? (i) The SI unit of radioactivity is curie (Ci) (ii) `1 Ci = 3.7 xx 10^(-

Description : Which of the following are correct with respect to the unit of radioactivity? (i) The SI unit of radioactivity is curie (Ci) (ii) `1 Ci = 3.7 xx 10^(-

Last Answer : Which of the following are correct with respect to the unit of radioactivity? (i) The SI unit of radioactivity is ... (i) and (ii) D. (ii) and (iv)

Correct order of radioactivity is:

Description : Correct order of radioactivity is:

Last Answer : Correct order of radioactivity is: A. `._(1)H^(1) gt ._(1)H^(2) gt ._(1)H^(3)` B. `._(1)H^(3) gt ._(1)H^ ... `._(1)H^(3) gt ._(1)H^(1) gt ._(1)H^(2)`

Which of the following has the highest value of radioactivity?

Description : Which of the following has the highest value of radioactivity?

Last Answer : Which of the following has the highest value of radioactivity? A. 1 g of Ra B. 1 g of `RaSO_(4)` C. 1 g of `RaBr_(2)` D. 1 g of `Ra(HPO_(4))`