1. Liz has a high-power laser pointer with an electromagnetic radiation beam of power .9mW and circular cross-section of diameter 1mm. 1.1. Find the peak electric and magnetic field strengths

1m from the tip of the laser pointer. Draw a diagram and also use words to explain your reasoning. 1.2. Next, using optical lenses, Liz focuses down the beam to having a diameter of 5 wavelengths. If the laser has Em radiation only frequency 5.5 × 1014 Hz, find the new electric and magnetic field strengths 1m from the tip of the laser pointer. Draw a diagram and also use words to explain your reasoning. 1.3. Now, consider the same frequency source, but originating from an LED lightbulb. If the light bulb sends photons uniformly out in all directions, and has the same source power as the laser, determine the strength of the electric field and magnetic field 1m away from the bulb. Draw a diagram and also use words to explain your reasoning. 1.4. Compare the electric field strength from the laser with the electric field strength from the lightbulb, the same distance away from both. Explain whether light bulbs or laser need to have a higher source power, such that they can have the same intensity a certain distance away. Additionally, explain what we can change about a laser beam of constant source power, to increase the strength of the electric field. Draw a diagram and also use words to explain your reasoning.