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Subjects
Science State Board
Class 8
Light
The properties and applications of light
9.
Exercise on Image formation
Exercise condition:
2
m.
Select the correct answer
:
1
.
The distance from the pole to the focus is called __________.
focal length
pole length
principal axis
none of the above
2
.
The ENT doctor uses a __________.
convex mirro
plane mirror
concave mirror
convex lens
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