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Wow! Thanks.I think they are all possible.
What if you use the same pattern but a different example?For me it could only be "on" or, at a stretch, onto.
I agree with you. I just felt I couldn't make the same assumption and give a blanket statement that they are all wrong. So even though it's odd, I assumed the sunlight concentration could also be in a place, not only on an object. At least for the purposes of this discussion.The "small area" is not only the target of the bombing but also the place the bombing is happening, whereas in the first example I imagine a concentration, almost like a laser beam, of sunlight.
I also think they all get the point across satisfactorily.I think they are all possible.
I agree with you that "to" is the least correct and may even be incorrect. Regardless this is not a good exam question because multiple answers are grammatically correct and possible. And your blanket statement is not correct and not a good rule. For example a laser concentrates light in a beam, not on a beam. And even "to" doesn't sound wrong sometimes. Here's a Google'd example:Possibly so, but the "correct" proposition to use with "concentrate" is "concentrate on" going on what I have always said, the dictionary and what I think you would agree with if you think about what you say. You'd never say "we need to concentrate to/in this project at the moment". A lot of language would "get the point across" but would be wrong, and not get any marks in an exam.
The text is correct and so is JohnnyG. Solar cookers don't use solar panels, they use mirrors to focus/concentrate the light.johnnyG, here's from the textbook. Is this incorrect or inaccurate?
What's wrong with the text? The "concentrate into" part? As you said earlier, you could concentrate into an area.But again, that's not the object of the beam/, which is when "on" is the only option. And I would say wherever that googled example is from was written by someone who didn't speak English correctly Just like Hirashin's text which seems to be taken from Wikipedia, whereas all other professionally written articles only use concentrate with "on"