Question 1 A circular aperture is lit up by a laser with wavelength 628 nm. The central maximum on the screen 51.0 cm away has the same diameter as the circular aperture. What is the diameter of the circular aperture? : Question 2 A lens placed 7.00 cm in front of an object creates an upright image 3.00 times the height of the object. The lens is then moved along the optical axis until it creates an inverted image 3.00 times the height of the object. How far did the lens move? : Question 1 The sun generates its energy through nuclear fusion, making helium from hydrogen. The main process by which this happens, called the protonproton chain, goes as follows: . Two protons come together to create deuterium, a positron, a neutrino, and energy: p + p a D + eJr + v + energy . The deuterium fuses with another proton to make 3He: D + p > 3He + energy - Fianlly, 4He is produced by fusing two 3He nuclei together: 3He + 3He >4He + p + p + energy What is the total energy released during the creation of one 4He nucleus? Give your answer in Me'v and rememberthat you need to make two 3He nuclei in the process. Be sure to use at least five significant figures for your masses, but your nal answer should have three or four sig figs. : Question 2 Nuclear medicine often uses radioactive samples as a tracer to monitor processes inside the body. Suppose a nuclear reactor makes a certain isotope sample with an initial activity of 1 89 mCi, and the sample gets delviered to a hospital 13.5 hours later, when its activity has become 51.4 mCi. Luckily, the sample remains usable until its activity drops below 12.4 mCi. How long after the delivery is this sample usable