CLASS TASK ON LENSES
Quiz
•
Physics
•
8th - 11th Grade
•
Practice Problem
•
Medium
Atteh Oluwabusayo
Used 6+ times
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19 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
As an object is moved close to the focus of a converging lens from infinity its image I. moves closer to the lens II. moves away from the lens. III. Remains the same size. IV becomes smaller. Which of the statements above is/are correct?
II only
1 and III only
IV Only
III only
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Concave lens is also called
diverging lens
converging lens
convex lens
none of the above
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Power of a lens is defined as the reciprocal of its
vertex
optical center
principal axis
focal length in meters
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A point on the principal axis at the center of lens is known as
principal axis
optical center
principal focus
focal length
5.
OPEN ENDED QUESTION
3 mins • Ungraded
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6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
As the focal length of a concave lens is positive, therefore its power should be
negative
positive
always zero
7.
OPEN ENDED QUESTION
3 mins • Ungraded
If an ophthalmologist places a 3.00 diopter lens next to 0.75 diopter lens, the power of lens should be
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