There are four oscilloscopes, A, B, C, and D, in a laboratory that are equipped with individual indicator circuits. These indicator circuits give out a logic 1 anytime the scope malfunctions. Design a circuit that would be able to indicate that three or more of the scopes are malfunctioning.

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?