1) An image created by a lens can ONLY be seen if you are looking through the le

Question

1) An image created by a lens can ONLY be seen if you are looking through the lens. This image is

A) this doesn't describe either real or virtual images
B) either real or virtual
C) real --> NOT THE ANSWER
D) virtual

2)You are able to project an image on a sheet of paper. The image must be

A) virtual----> NOT THE ANSWER
B) real or virtual
C) real
D) this doesn't describe either real or virtual images

3)One tell-tale sign of a virtual image is that:

A) it's always created by a diverging lens
B) it's always smaller than the object
C) it's always upright
D) it's always on the opposite side of the lens from the object---> NOT THE ANSWER
E) it's always larger than the object

4)Which statement below best describes the focal point for lenses?

A) for converging lens: all rays entering the lens parallel to the optical axis converge at the focal point; for diverging lens: all rays entering the lens parallel to the optical axis diverge from the focal point.
B) all rays coming into the lens converge at the focal point for any lens---> NOT THE ANSWER
C) all rays entering the lens parallel to the optical axis converge at the focal point for any lens
D) for diverging lens: all rays entering the lens parallel to the optical axis converge at the focal point; for converging lens: all rays entering the lens parallel to the optical axis diverge from the focal point.

Explanation / Answer

1)

an image can be seen through the lens in both cases ,

B) either real or virtual

2)

for projecting the image on a sheet of paper , image must be real

C) real

3)

for vrtual images , as the image is always virtual and upright

hence , one tell sign is

C) it's always upright

4)

A) for converging lens: all rays entering the lens parallel to the optical axis converge at the focal point; for diverging lens: all rays entering the lens parallel to the optical axis diverge from the focal point

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