Thermometers are made of glass as glass has a very low coefficient of thermal expansion. If it was some other material than glass, it would expand unevenly and the capillary which hold the mercury will also undergo irregular fluctuations and lead to a faulty measurement..
Moreover, why is the bulb of thermometer made of thin glass?
Its made of glass with very thin walls to allow the heat from sample being measured to reach the liquid quickly for fast response and quick reading (improves the quickness of response by the thermometer). — has a vacuum above the liquid column so there is no resistance to the expanding liquid.
Similarly, what are glass thermometers made of? The mercury-in-glass or mercury thermometer was invented by physicist Daniel Gabriel Fahrenheit in Amsterdam (1714). It consists of a bulb containing mercury attached to a glass tube of narrow diameter; the volume of mercury in the tube is much less than the volume in the bulb.
Also asked, why bulb is made of glass?
A glass bulb, then, is used to keep oxygen away from the filament. The presence of an inert gas, such as Argon, actually inhibits this deterioration, allowing higher filament temperatures and brighter light bulbs. So the glass globe can also help enhance a bulb's capability.
Why mercury is chosen as thermometric liquid?
Mercury is the only one in liquid state at room temperature. It's used in thermometers because it has high coefficient of expansion. Hence, the slightest change in temperature is notable when it's used in a thermometer. It also has a high boiling point which makes it very suitable to measure higher temperatures.
Related Question Answers
Why thermometer has thick walls on its stem?
The bulb has a thin wall so that the heat can reach it soon. The stem has a thick wall because it has mercury inside it so when the the temperature rises the mercury bounces inside the thermometer.Why is the bulb of a thermometer small?
The small size of the bulb means that the bulb reaches the temperature of what it is measuring very quickly, and the tube in such a thermometer is micro-fine. Mercury also avoids the freezing and boiling problems associated with water.Why does a thermometer have a narrow capillary tube?
The narrow bore of te capillary tube makes the thermometer more sensitive. This is because a small expansion of the mercury in the bulb will cause a big change in the length of the mercury thread. The bulb is made of thin glass so that heat can be conducted quickly to the liquid.What is the range of Fahrenheit scale?
Fahrenheit temperature scale is a scale based on 32 for the freezing point of water and 212 for the boiling point of water, the interval between the two being divided into 180 parts.Why does a clinical thermometer have a constriction?
What is the purpose of constriction in the clinical thermometer? It prevents the thermometric substance (Mercury or Alcohol) from running back into the bulb.Are LED bulbs glass?
Replicating the beautiful, sparkling light of a standard bulb, the new Glass LED bulb is a perfect fit throughout your home. These long-lasting LED bulbs will provide over 85% energy savings compared to incandescent. These long-lasting LED bulbs will provide over 85% energy savings compared to incandescent.Are LED bulbs plastic or glass?
Short answer: There isn't much of a difference in light output between plastic and glass. Plastic simply increases durability and lowers costs. Why are LED light bulbs so much more efficient than filament bulbs?Which glass is used in bulb?
Soda Lime Silicate (Soda Glass) It is used in filament lamp.What is the thing that holds a light bulb called?
A lightbulb socket, light socket, lamp socket or lampholder is a device which mechanically supports and provides electrical connections for a compatible electric lamp.What is filament made of?
The filament is the part of the light bulb that produces light. Filaments in incandescent light bulbs are made of tungsten. Whenever n electric current goes through the filament, the filament glows. It may also be known as the electron emitting element in a vacuum tube.What is light bulb made of?
The incandescent light bulb is made out of few materials – metal, glass and inert gas, and together they form a light bulb which provides us with light. These three materials combined create a light bulb. But it is done in a certain way, in order to make the bulb to emit light.How are bulbs formed?
True bulbs are divided into tunicate bulbs and imbricate bulbs. Many plants such as daffodils form new bulbs around the original bulb. These bulbs, called offsets, develop from buds within the base of the mother bulb and produce new plants. When these bulbs become overcrowded,the flowers start to diminish in size.What are incandescent lights used for?
Common uses and advantages Incandescent lamps are commonly used in desk lamps, table lamps, hallway lighting, closets, accent lighting, and chandeliers. They provide good color rendering and, in fact, serve as the color standard by which all other lamps are measured. Incandescent lamps are easily dimmable.Will a light bulb work if the glass is broken?
In case the glass shell is cracked/broken, the nitrogen gas which is contained in the glass shell of an electrical bulb would get mixed with oxygen and as soon as the current is switched on the filament would just burn up in the high temperature of the filament.What happens if mercury touches your skin?
Mercury is a very toxic or poisonous substance that people can be exposed to in several ways. If it is swallowed, like from a broken thermometer, it mostly passes through your body and very little is absorbed. If you touch it, a small amount may pass through your skin, but not usually enough to harm you.How long should a glass thermometer be?
For glass thermometers, hold in place for 3 minutes. Take the thermometer out and read the temperature. Use a thermometer with a long, thin tip (Picture 1). Be sure your child has not had anything hot or cold to eat or drink for 20 minutes before you take his temperature.When did they stop putting mercury in thermometers?
Since 2001, 20 states have banned mercury “fever thermometers” for medical use, and regulations tighten every year. Many pharmacies now carry only sterile digital replacements or the less accurate ones with red glop in the bulb.How do you read a glass thermometer?
Reading the glass thermometer (that is, determining the temperature shown) is done by holding the thermometer horizontally by the stem end (the end opposite the bulb) at eye level and rotating the thermometer until the mercury in the shaft can be clearly seen.Can mercury in thermometer kill you?
Mercury thermometers are practically antiques nowadays. Mercury is toxic, but rarely kills. It can be absorbed into the bloodstream via skin contact. Heavy metal poisoning causes nausea, headache, weakness, as well as damage to the liver and kidneys, but you usually get better. 
