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A light ray in air enters and passes through a square block of glass. What can be stated with regard to its speed after it emerges from the block?
a) Its speed is less than when in glass
b) Its speed is less than before it entered glass
c) Its speed is same as that in glass
d) Its speed is same as that before it entered glass
and
In order to see a huge right-side-up image of yourself, you should use a concave mirror and place your face:
a)inside the focal point
b)at the focal point
c)between the focal point and twice the focal poing
d)at twice the focal point
e)beyond twice the focal point
I think the answer to this one is a, but I am not positive.
Please help!
a) Its speed is less than when in glass
b) Its speed is less than before it entered glass
c) Its speed is same as that in glass
d) Its speed is same as that before it entered glass
and
In order to see a huge right-side-up image of yourself, you should use a concave mirror and place your face:
a)inside the focal point
b)at the focal point
c)between the focal point and twice the focal poing
d)at twice the focal point
e)beyond twice the focal point
I think the answer to this one is a, but I am not positive.
Please help!