Question

pls answer a & b asap thanks i will rate

Consider a room heater that uses a concave mirror to reflect infrared radiation from hot coils. The mirror has a radius of curvature of 55.0 cm and produces an image of the coils 2.70 m away from the mirror. Calculate the intensity of IR radiation in W/m2 projected by the concave mirror on a person 2.70 m away. Assume that the heating element radiates 1,350 W and has an area of 120 cm?, and that half of the radiated power is reflected and focused by the mirror. W/m2

Answer 1

0.13 nadians Intensity IR radiation projected by murier person, of On ។ 0.13 x 11.25x10 Чт 0.13 2 x 11.95 x 10 Watt/m 4x 3.14 0.1164x109 Watt/ma - 1,164 x 10? Watt/m²

v= Cm -11.76 cm 0.085 Magnification hi - he ne w no 1176 93.5 M -0.5 Magnification 0.5