physics :

Question 3 10 pts For a double slit experiment, what is the smallest separation (in mm) between two slits that will produce a second-order maximum for 625 nm visible light? You need to round your answer to the nearest integer, do not include unit. Question 4 10 pts What is the distance (in um) between the lines on a diffraction grating that produces a second-order maximum for 700-nm red light at an angle of 600 ? Your answer should be a number with two decimal places, do not include unit