Q4. Listed below are the results of measurements taken on several different junction diodes. For each diode, the data provided are the diode current ID and the corresponding diode voltage V. In each case, estimate IS, and the diode voltage at 10 ID and ID /10. (a) 10 A, 800 mV (b) 10 μA, 600 mV

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?