10.38 A direct-coupled amplifier has a low-frequency gainof 40 dB, poles at 1 MHz and 10 MHz, a zero on the negativereal axis at 100 MHz, and another zero at infinite frequency. Express the amplifier gain function in the form of Eqs.(10.56) and (10.57), and sketch a Bode plot for the gainmagnitude. Does this amplifier have a dominant pole? If so, at what frequency? What do you estimate the 3-dB frequencyto 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?