Hard questions about light?

1.an object 5mm high is located 15mm in front of a plane mirror how far from the mirror is the image


a.5.0mm


b.7.5mm


c.15mm


d.30mm





2.which of the following values represents an index of refraction of an actual material


a.0


b.1/4


c.1/2


d.5/4





3.which of the following lenses is a converging lense


a.double convex


b.spherical convex


c.plano concave


d.convexo concave





4.a virtual image produced by a lens is always


a.larger than the object


b.smaller than the object


c.located in front of lens


d.located in back of lens





5.in which of the following materials is the velocity of light greatest


a.air


b.water


c.crown glass


d.fused quartz





6.when an object is place 8mm from a concave spherical mirror,a clear image can be projected on a screen 16mm in front of the mirror. if the object has height of 4mm the height of the image is


a.2mm


b.4mm


c.8mm


d,12mm

Hard questions about light?
1. c





2.





3.





4. b?





5. a





6.
Reply:When I was in school, we had something called h-o-m-e-w-o-r-k. It consisted of many problems on a certain subject, that, when solved by the one to whom it was assigned, it yielded the fruits of knowledge. I hope you will try to do your own.