The ability to clearly see an object is affected by the wavelength striking the object and by the amount of light allowed through the disphragm onto the specimen(numerical aperture).

I think above information is correct.

But, I am not sure. Is it True or False?
I just think that its true.

Please help me , Thank you

Hmm, I don't quite know about it... but one thing I'll like to add is there shouldn't be any interference between the light waves.

Let's wait for somebody else.

Okay lol It is my first biology class in my life!
Please help me!

Perhaps you're referring to a microscope? The lens are the ones responsible for the 'sharpness' of the image. You need the light rays to be focused. If they're out of focus, then you'll have a blurred image.

I'm not sure if that is the right way to say it though... I never had a class about practical biology. I stopped biology two years ago because of the limited options.