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Questions and Answers
What is the point where light rays converge for a concave mirror referred to as?
What is the point where light rays converge for a concave mirror referred to as?
- Principal axis
- Paraxial rays
- Focal plane
- Focal point (correct)
Which of the following best describes the focal length of a mirror?
Which of the following best describes the focal length of a mirror?
- Distance between the focus and the pole of the mirror (correct)
- Distance between the focal plane and the mirror surface
- Distance between the paraxial rays and the principal axis
- Distance between the principal axis and the focus
What is the plane that passes through the focus and is perpendicular to the principal axis known as?
What is the plane that passes through the focus and is perpendicular to the principal axis known as?
- Axial plane
- Principal plane
- Focal plane (correct)
- Marginal plane
Which type of rays fall close to the pole and make small angles with the principal axis?
Which type of rays fall close to the pole and make small angles with the principal axis?
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What happens to marginal rays in terms of their distance from the pole and angles with the principal axis?
What happens to marginal rays in terms of their distance from the pole and angles with the principal axis?
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Why is the study restricted to paraxial rays in this chapter?
Why is the study restricted to paraxial rays in this chapter?
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