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Question
Complete the following diagram and state what happens to the ray of light after refraction through the lens.
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Solution
A ray of light that passes through the principal focus or appears to pass through the principal focus, goes parallel to its principal axis.
RELATED QUESTIONS
The diagram below shows a lens as a combination of a glass slab and two prisms.
- Name the lens formed by the combination.
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- Complete the path of the incident ray AB after passing through the lens.
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In the diagram below, XX’ represents the principal axis, O the optical centre and F the focus of the lens. Complete the path of rays A and B as they emerge out of the lens.
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| (a) | (b) |
Distinguish between a real and a virtual image.
Study the diagram shown in Fig. 5.56
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ln fig, , a real image of a point objert O is formed, Which of the following statements is true about each of the arrangements?
(i) The object is at the principle focus of the lens
(ii) The focal length of the lens is 17 cm
(iii) lf the mirror is moved so that it is 6 cm from the lens image will also move
Define the term focus of a lens.
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