Determine whether the following statement are True or False. Explain your answer. 1. The engine below is an irreversible heat engine. [10 marks] High temperature, TH =500K OH =6000J Engine L=3000J Low temperature, TL =230K 2. If the surface temperature of an object falls from 80C to 40 C, the radiant energy will decrease by factor of 16. [10 marks] 3. A monochromatic light of wavelength / passes through a single slit of width d and forms a diffraction pattern on a screen. If the light is replaced by another monochromatic light of wavelength 21, and the slit width is changed to 2d, the same diffraction pattern can be reproduced. [10 marks]