I still can't get this. Stefan Boltzmann law states only Power radiated= σT^4. But where do we get the L and r?trurle said:For constant voltage at ends,
T~r1/4L-1/2
Use Stefan-Boltzmann law and neglect ambient temperature.
L and R affect both radiated power (by Joule-Lenz law) and surface area of filament which affect radiated power densityBaibhab Bose said:I still can't get this. Stefan Boltzmann law states only Power radiated= σT^4. But where do we get the L and r?
The temperature of a thin bulb filament can vary depending on the type of bulb and the wattage. However, on average, the temperature can range from 2,500 to 3,000 degrees Celsius.
The temperature of a thin bulb filament is typically measured using a thermocouple or an infrared thermometer. These devices can accurately measure the temperature without touching the filament, which could affect the reading.
The temperature of a thin bulb filament can be affected by the wattage of the bulb, the type of gas inside the bulb, and the ambient temperature. Other factors such as the thickness and material of the filament can also play a role.
Yes, the temperature of a thin bulb filament can be controlled by adjusting the voltage and wattage of the bulb. A lower voltage and wattage will result in a lower temperature, while a higher voltage and wattage will result in a higher temperature.
A high temperature thin bulb filament can pose a fire hazard if it comes into contact with flammable materials. It can also cause burns if touched, and the heat can potentially damage the surrounding components of the bulb or fixture. It is important to handle and use high temperature bulbs with caution.