Lenses Grade 8 Question Preview (ID: 51347)


Lenses For Grade 8 Physics. TEACHERS: click here for quick copy question ID numbers.

Any incident ray on a converging lens emerges :
a) toward the optical axis
b) away from the optical axis
c) continues without any deviation
d) None of the choices

Any Incident ray on a diverging lens emerges:
a) toward the optical axis
b) away from the optical axis
c) continues without any deviation
d) None of the choices

Converging lens is a lens that is:
a) thick at the edges and thin at the middle
b) thin at the edges and thick at the middle
c) thick at the edges and the middle
d) thin at the edges and middle

Diverging lens is a lens that is:
a) thick at the edges and thin at the middle
b) thin at the edges and thick at the middle
c) thick at the edges and the middle
d) thin at the edges and middle

When the emergent ray leaves the lens away from the optical axis, then the lens is:
a) converging lens
b) diverging lens
c) all of the above
d) None of the choices

When the emergent ray leaves the lens toward the optical axis, then the lens is:
a) converging lens
b) diverging lens
c) all of the above
d) None of the above choices

The symbol of the object focus is:
a) F
b) F'
c) O
d) None of the above choices

The image focus F’ is the image of object focus F with respect to:
a) object focus F
b) optical axis
c) image focus
d) optical center O

When the incident ray is at the same side of the image focus F’, then the lens is:
a) converging lens
b) diverging lens
c) All of the above
d) None of the above choices

When the source of light is at the same side of the object focus F, then the lens is:
a) converging lens
b) diverging lens
c) All of the above
d) None of the above choices

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