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Question
Distinguish between a real and a virtual image.
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Solution
| Real image | Virtual image |
| 1. A real image is formed due to actual intersection of refracted (or reflected) rays | 1. A virtual image is formed when the refracted (or reflected) rays meet if they are produced backwards |
| 2. 2 A real image can be obtained on a screen | 2. 2. A virtual image cannot be obtained on a screen |
| 3. 3. A real image is inverted with respect to the object. | 3. 3. A virtual image is erect with respect to the object |
RELATED QUESTIONS
What is a lens?
In figure, (a) and (b), F1 and F2 are the two foci of thin lenses and AB is the incident ray. Complete the diagram to show the path of the ray AB after refraction through each lens.
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| (a) |
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| (b) |
Study the diagram shown in the following Figure.
Name the lens LL’ and draw its outline.
A ray of light incident parallel to the principal axis of a lens, passes undeviated after refraction.
A ray of light incident at the optical centre of lens, passes undeviated after refraction.
State the condition of the following:
A ray passes undeviated through the lens.
In the following diagram the object and the image formed by the respective lenses are shown. Complete the ray diagram, and locate the focus. Find the focal length of the lens.
Make the correct choices in the following items :
A lens used as a magnifying glass
(i) ls a diverging lens
(ii) Produces a virtual image
(iii) ls placed with the object nearer the lens than the principle focus
Make the correct choices in the following items :
The image formed by a diverging lens, shown in fig, , is
