1. Show that 2. Explain the radiation error in high temperature measurement. 3. What is thermocouple error? How is this error reduced when the thermocouple is shielded? 4. Show that the net radiative...

1. Show that

2. Explain the radiation error in high temperature measurement.

3. What is thermocouple error? How is this error reduced when the thermocouple is shielded?

4. Show that the net radiative energy transfer from a conical cavity of diameter D, height H, lateral length L, semi-vertex angle
 and surface area A₁
is given by

If a flat surface of area A2 covers the cavity, show that