Object Image and Focal Distance Relationship (Proof of Formula)
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isnt the image at the start virtual because its behind the mirror.
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WOW! It's so magical seeing you proving a formula... but anyways, how do the scientists actually found out this equation????
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Well your videos absolutely rule! Their so so good
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Cool. Well explained.
Still a bit tricky to follow the cursor when you are pointing to something.
A bigger (more obvious) cursor would be easier to see where you are pointing.
Very enjoyable stuff though. - Thanks V much
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can i just say that this got me an amazing grade on my physics lab. THANK YOU KHAN ACADEMY!!!
gavrilovskid 10 months ago 3
@griftorifto2 Too bad *their* aren't any videos on grammar yet. ;-)
gavin32 1 year ago