1. An electric current heats a tungsten wire to a temperature of 3,200 K. By assuming: That the wire behaves like a perfect transmitter at this temperature, calculate the length Wave of the peak emission. Give the answer in nm. 2. Monochromatic light is incident on a 68.0 length diffraction network Mm and comprising 48,000 lines. The second-order maximum is observed at an angle of 33.7. What is the wavelength of the ' Last incident? Give the answer in nm. 3. A point load Q is located near another 3Q load, and are the only objects Loaded present. If the electrical force module on Q is F, what is the electrical force? Out of 3