Physics · Optics, Nature of Light and Optical Instruments
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A point source of light is placed at the principal focus of a concave lens. Which of the following will be true of the refracted light?
I- I will diverge.
II- It will be paralel to be principle axis.
III- It will seem to come from a point 1/2 of the radius of curvature from the lens.
IV- It will converage.
- A
I, II and III Only
- B
I and III only
- C
II and IV only
- D
IV only
- E
None of the above
Statement I is correct because a concave lens is diverging.
Statement II is incorrect because the refracted rays will not be parallel to the principal axis.
Statement III is incorrect because this is not true.
Statement IV is incorrect because a concave lens is diverging while a convex lens is converging.
Judging from our deductions about the statements, none of the options A, B, C, or D are correct. Hence option E is the right answer.
Statement I is correct because a concave lens is diverging.
Statement II is incorrect because the refracted rays will not be parallel to the principal axis.
Statement III is incorrect because this is not true.
Statement I is correct because a concave lens is diverging.
Statement III is incorrect because this is not true.
Statement II is incorrect because the refracted rays will not be parallel to the principal axis.
Statement IV is incorrect because a concave lens is diverging while a convex lens is converging.
Statement IV is incorrect because a concave lens is diverging while a convex lens is converging.
This option is incorrect.
Tagged under Physics · Optics, Nature of Light and Optical Instruments · 2009