An amplifier has a gain of 10 and follows a bandpass filter where the loss in the center of the bandpass is 0.05. What is the combined gain/loss of the two cascaded blocks at the center frequency of the filter?

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?