What is an example of incandescence?
What is an example of incandescence?
Incandescent light is given off when an object is heated until it glows. White-hot iron in a forge is incandescent, as is red lava flowing down a volcano, as are the red burners on an electric stove. The most common example of incandescence is the white-hot filament in the light bulb of an incandescent lamp.
What is 60 watt bulb equivalent?
For example, a 60-watt incandescent light bulb gives approximately 800 lumens; therefore, to replace a 60-watt incandescent bulb with a LED bulb of the same brightness, one should purchase a LED bulb that also gives 800 lumens. A 60-watt incandescent light bulb can be replaced with a 10-watt LED.
How many lumens is 80 watts?
Wattage to Brightness Comparison
| Incandescent Bulb Wattage | Equivalent Halogen Bulb Wattage | Equivalent LED Bulb Wattage |
|---|---|---|
| 40 W (~460 lm) | 28 W | 6 W |
| 60 W (~830 lm) | 45 W | 11 W |
| 75 W (~1100 lm) | 56 W | 15 W |
| 100 W (~1800 lm) | 80 W | 24 W |
What is an incandescent body give Example 6?
Ans: The bodies which emit light when heated to a very high temperature are called incandescent bodies. Example: electric bulb.
Is a candle incandescent?
There are many incandescent materials. One example is carbon which is made in a candle flame. As the wax in the candle burns, tiny particles of carbon are made in the air around the wick. The candlelight is made by incandescent carbon or soot particles.
What is the corresponding substituent of indole?
The corresponding substituent is called indolyl . Indole undergoes electrophilic substitution, mainly at position 3 (see diagram in right margin).
What is the best method for indole synthesis?
The most useful route to indoles is the Fischer indole synthesis in which an aromatic phenylhydrazone is heated in acid. The phenylhydrazone is the condensation product from a phenylhydrazine and an aldehyde or ketone.
What is the most reactive position on indole for aromatic substitution?
The most reactive position on indole for electrophilic aromatic substitution is C3, which is 10 13 times more reactive than benzene. For example, it is alkylated by phosphorylated serine in the biosynthesis of the amino acid tryptophan. Vilsmeier–Haack formylation of indole will take place at room temperature exclusively at C3.
How many indole derivatives are made each year?
Each year, thousands of indole derivatives are made in pursuit of life saving medicines. The Fischer indole synthesis is one of the oldest and most effective methods of indole development and was first invented by Fischer in 1883.
