7. When switching to the 100X lens, what should you use? -

a) The 100X lens should only be used with low light intensity

b) 100X lenses should be used with a few drops of immersion oil to enhance the image

c) When switching to the 100X lens, a wet cloth should be used to clean the lens for clarity

d) The 100X lens should be used in conjunction with a 15X eyepiece only


It’s not D I turned it in like that and I got it wrong :/ please help