According to ohms law what is the resistance of a light bulb if the applied voltage is 9.0v and the current is 0.30 amps

Spend time observing or thinking about events that involve matter and energy. which events can you explain? which events can’t you explain?

State one advantage and one disadvantage of using a plane mirrior as a driving mirrior

Glass is transparent to visibile light under normal conditions; however, at extremely high intensities, glass will absorb most of the light incident upon it. this works through a process known as multiphoton absorption. in this process, several photons are absorbed at the same time. if very intense light whose photons carry 2ev of energy is shined onto a material with a band gap of 4ev, that light can be absorbed through two-photon absorption, because two photons have the right amount of energy to bridge the band gap. what is the minimum number of photons of 800-nm light that are needed to equal or exceed the band gap of fused silica glass