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Why is there hardly any air in a glass bulb?
Hi! This is the question for this question! Because air was contained with oxygen and oxygen so oxygen with smallest heat it burns down the filament! This is also evacuated and filled with a gas which does not react with the red hot filament. So .... if air present the filament would quickly oxidise and fail to light up!
Why is the glass around the bulb so thin?
The glass around the bulb is thin to allow light to pass through easily. Thicker glass would absorb more light and reduce the brightness of the bulb. Thin glass also helps to dissipate heat generated by the bulb efficiently.
Why is the glass around the bulb in a thermometer so thin?
The glass around the bulb in a thermometer is thin to allow for a quick transfer of heat from the environment to the bulb. This ensures that the temperature reading is accurate and responds rapidly to changes in temperature. Thicker glass would act as an insulator and slow down this heat transfer process.
What will happen if you try to complete a circut by joining the glass of a light bulb to the batttery?
The glass of the light bulb is not conductive, so the circuit would not be completed. You would need to join the wires to the positive and negative contacts on the base of the bulb for the circuit to work.
Why is the bulb of thermometer made of thin glass?
The bulb thermometer is made of thin glass so as to detect the slightest change in temperature. It is made of thin glass for visibility as well.
Could an ordinary glass can serve as the glass bulb of a bulb?
Sure. But before you can use it to provide light, you need to find a way to take all the air out of it, and seal it so that no air gets back in. If air gets into a light bulb, the bulb immediately burns out.
Why does an electric bulb bang when it is broken?
Light bulbs have most of the air removed, that is there is a partial vacuum inside the bulb. So, when they break atmospheric pressure pushes the on the glass where it is weakened and air rushes somewhat violently into the bulb.
Why does heat from the top of the bulb feels different from the heat on the side of the bulb?
The heat from the filament radiates in all directions inside the bulb (as there is no air for convection). Once the heat reaches the glass the heat is now transmitted by both radiation and convection.Hot air rises so the air on the side of the bulb is heated and it rises up, it is now replaced by cooler air which needs to be heated. So the air on the side of the bulb is colder than the air on top. If you hand is on top of the bulb it will be heated by the air raising from the side as well as the top.
Why is there hardly any air in a glass bulb?
Hi! This is the question for this question! Because air was contained with oxygen and oxygen so oxygen with smallest heat it burns down the filament! This is also evacuated and filled with a gas which does not react with the red hot filament. So .... if air present the filament would quickly oxidise and fail to light up!
Why does an electric light bulb have a vacuum?
Oxygen in the bulb would cause the hot metal elements to oxidized and burn out. Mr. Edison had a large problem with this until he removed the air from his bulb. Most incandescent bulbs today do not have a vacuum but instead are filled with an inert gas. MORE DETAILS: Modern light bulbs don't hold a vacuum. Instead they are filled with an inert (electrically non-conducting) gas such as Nitrogen. An inert gas is used to fill the bulb (instead of just pumping out almost all the ordinary air to leave a near-vacuum) because the action of filling the bulb with an inert gas flushes away ALL of the ordinary air. In addition the inert gas has the very useful physical property of conducting heat directly from the glowing filament to the whole inner surface area of the glass bulb. The heat then passes through the glass and the whole outer surface area of the glass bulb then conducts and radiates heat into the surrounding air. It is important to understand that the inert gas does not allow the filament to "burn away" as it would if some air were still present in the bulb. This sometimes happens if a light bulb gets knocked and gets even a tiny hole or crack in its glass bulb: the oxygen present in ordinary air will quickly make the filament burn away. So, to summarize, the inert gas which is used to fill the glass bulb allows the filament to glow very brightly without burning away and conducts the heat produced by the filament away to the outside air via the glass bulb.
Why is the glass around the bulb so thin?
The glass around the bulb is thin to allow light to pass through easily. Thicker glass would absorb more light and reduce the brightness of the bulb. Thin glass also helps to dissipate heat generated by the bulb efficiently.
Why do light bulbs have a vacuum inside?
It is something that takes out the oxygen so it can last longer. A vacuum is a negative pressure, meaning there is no oxygen in there. Most modern bulbs don't use a vacuum. They simply pump in an inert gas that won't contribute to burning, and that chases the oxygen out.
What does the glass bead do on a light bulb?
it separates the filament and supports so they won't touch
Why is the glass around the bulb in a thermometer so thin?
The glass around the bulb in a thermometer is thin to allow for a quick transfer of heat from the environment to the bulb. This ensures that the temperature reading is accurate and responds rapidly to changes in temperature. Thicker glass would act as an insulator and slow down this heat transfer process.
What will happen if you try to complete a circut by joining the glass of a light bulb to the batttery?
The glass of the light bulb is not conductive, so the circuit would not be completed. You would need to join the wires to the positive and negative contacts on the base of the bulb for the circuit to work.
Why is the bulb of thermometer made of thin glass?
The bulb thermometer is made of thin glass so as to detect the slightest change in temperature. It is made of thin glass for visibility as well.
How is thermal energy transferred from a filament to the outside air of the light bulb?
because thermal energy is heat being transferred between to objects so as the light bulb is turned on its thermal energy is hotter or colder than the outsides air so the energy will allow it to become the temperature as the outside air Im 11 had this for science it took me for ever then i just relised it and wonted to let you guys no is278 marine park stephons work of art
