Concave and convex mirrors....?

true or false...





a.The image produced by a convex mirror is always closer to the mirror than it would be in a plane mirror for the same object distance.





b.A convex mirror never forms a real image of a real object.





c.When an object is placed between a concave mirror and its focal point, the image is virtual.





d. The virtual image formed by a convex mirror is always enlarged.





e. A concave mirror always forms a virtual image of a real object.





f. A concave mirror always forms an enlarged real image of a real object.





g. A virtual image formed by a concave mirror is always enlarged.








a. not sure


b. true because convex is negative and virtual


c. true


d. true because m is pos. enlarged and upright


e. false because concave is neg. and real


f. true because m is pos. enlarged and upright


g. not sure








any suggestion...and please explan why they are true or false....

Concave and convex mirrors....?
first of all, there are no hard and fast rules you have to follow here. drawing clear ray diagrams specific to the question really helps you a lot. if you don't know how, check out this site





http://hyperphysics.phy-astr.gsu.edu/hba...





and here are the answers.





a) true


b) true


c) true


d) false


e) false


f) false


g) true
Reply:a)True


b)True


c)True


d)False, magnification(m) is defined as -v/u for mirrors.


also, m=h(i)/h(o)


since u is -ve and v is +ve and v%26lt;u(as answered above),so


h(i)/h(o)%26lt;1, so, h(i)%26lt;h(o) here h(i) is height of image and h(o) is height of object.


e)False.


f)False, when the object is between the focus and pole of the concave mirror a virtual image is formed.


f)True