We want to sample the voltage of a signal voltage with 1 MOhm internal impedance with 2 microVolt accuracy. In order to do that, we shunt the voltage generator by a capacitor. i) Design the capacitor, at least how large it should be?

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?