STEFAN BOLTZMAN’S APPARATUS

EXPERIMENTATION:‑

1. Determination of Stefan ‑ Boltzmann Constant.

DESCRIPTION:‑

The apparatus is designed to determine the Stefan Boltzmann constant. The apparatus consists of a hemisphere fixed to a Bakelite plate. The outer surface of which forms the jacket to heat it.

Hot water to heat the hemisphere is obtained from a heater in hot water tank which is fixed above the hemisphere. The copper test disc is introduced at the center of hemisphere. The temperatures of hemisphere and test disc are measured with the help of thermocouples and temperature indication. A timer is provided to measure the temperature of disc at the interval of 5 seconds.

FEATURES :‑

1. Easy understanding of phenomenon of heat transfer by radiation.
2. Determination of Stefan‑Boltzmann constant.
3. Built‑in timer for temperature readings at constant time intervals.
4. Digital Temperature Indicator.
   

SPECIFICATIONS :‑

1. Hemisphere dia‑160 mm(approx)
2. Jacket dia‑200 mm (approx)
3. Test disc size ‑ 20 mm dia x 1.5 mm thickness.
4. Water tank of sufficient capacity with a 1.5 kw immersion heater
5. Control Panel comprises of :‑
6. Voltmeter : 0‑100/200 volts.
7. Ammeter   : 0‑2A
8. Dimmer stat: 0‑240 volts, 2A
9. Supply for heater
10. Digital temperature indicator 0‑200°C with 0.1°C least count using
11. chormel alumel thermocouples, provided with cold  junction compensation.

SERVICE REQUIRED

1. 230vAC,5 amp single phase stabilized and earthed supply.
2. Space area of 0.6 m x 0.5m at working height

An instruction manual is supplied along with the equipment which describes the apparatus and procedure of experimentation.