Black holes do not exist—at least‚ not as we know them‚ says renowned physicist Stephen Hawking‚ potentially provoking a rethink of one of space’s most mysterious objects. A new study from Hawking also says that black holes may not possess "firewalls‚" destructive belts of radiation that some researchers have proposed would incinerate anything that passes through them but others scientists deem an impossibility. (Editor’s note: Watch for our feature "The Truth About Black Holes" in the March
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MOBILE RADIATION CONTROL PROJECT REPORT DEPARTMENT OF INFORMATION TECHNOLOGY THIAGARAJAR COLLEGE
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might think that if the black hole absorbs all kinds of radiation‚ it might possible not emit any too. But Stephen Hawking did a good piece of thinking on that concept and came up with the idea of the popular Hawking Radiation. He came up with this idea when his fellow student Jacob Bekenstein suggested that a Black hole should have a finite non-zero temperature and entropy and Black holes must emit some kind of radiation‚ Hawking radiation states that ’Close to the event horizon of a black hole
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like this‚ “A person is on a canoe going down Niagara Falls‚ once they reach a certain point the person can not get back up‚ while going down the gravity is stronger at the tip of the canoe than the end so‚ the canoe breaks in half‚” (“Stephen Hawking on Black Holes”). That is exactly what would happen to a person falling into a black hole but‚ by the time they actually got into the black hole they would be so broken up they would look like spaghetti. The only thing is everything people have predicted
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of gravity. In fact‚ light cannot even escape the power of a black hole. If light passes the event horizon there is no return and it is taken into the black hole. Once an object is sucked into a black hole‚ it begins to be bombarded with radiation‚ and crushed at atomic level. The point however when an object is completely gone is not the event horizon‚ but rather is the singularity. The event horizon is one of the layers that surrounds the singularity. Below is a diagram of the different
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ABSTRACT Mutation was induced via a physical agent‚ radiation. 4 levels of radiation—0 kr (control)‚ 10 kr‚ 30 kr‚ and 50 kr—were used in seeds to determine the radiation effects on the growth of Zea mays. Using two duplicate set-ups‚ each‚ planted with 18 seeds per radiation‚ the differences in height were observed from January 29 to March 17 in a 1 to 2-day interval (Mondays-Wednesdays-Fridays). Results show that as radiation increases‚ the potential of plants to grow decreases—0 kr seeds reached
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Effect of Ionizing Radiation on the Germination‚ Growth and Development of Corn (Zea mays L.) Alexis A. Parco BIO30 Group 1 Sec. A-6L September 27‚ 2012 ABSTRACT Corn seeds pre-exposed to 10‚ 30‚ and 50 kiloRads (kR) of radiation were grown in plots for almost 7 weeks. Four different setups – 10kR‚ 30kR‚ 50kR and the control‚ each with 10 corn seeds initially planted – were observed three times a week (during Mondays‚ Wednesdays and Fridays)‚ and the height of each growing corn was
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purpose is to provide information on cell phone radiation‚ the risks that can be caused by cell phone radiation‚ and the potential health problems that could result from this. Details of the topic: I am going to talk about the arguments about how cell phone radiation can affect our lives and whether these arguments are accurate or not. Cell phone radiation is a type of electromagnetic radiation that has the ability to cause health issues. The radiation from this device can cause serious brain tumours
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ABSTRACT The effect of different levels of radiation was determined using four set-ups-10kR‚ 30kR‚ 50 kR‚ and the control (no radiation). The four set-ups were observed for nine weeks and growth (in cm)‚ germination‚ and survival rate was measured. Results showed that at the right level of radiation level (10 kR)‚ radiation have a positive effect on the plant growth and has the same germination and survival rate from the control set up. The 30 kR set up and 50 kR set up are relatively smaller
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Light Absorption by Photosynthetic Pigments in Silver Beet Abstract The aim of the experiment was to determine the absorption of differing wavelengths of light by individual pigments in the vegetable silver beet. Pigments were extracted from silver beet leaves and separated into chlorophyll a‚ chlorophyll b‚ and carotene via chromatographs. Chlorophylls were then separated and an absorption spectra created using results obtained from a spectrophotometer. It was clear there were two distinct peaks
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