One half of a convex lens of focal length 10cm is covered with a black paper. Can such a lens produce an image of a complete object placed at a distance of 30cm from the lens? Draw a ray diagram to justify your answer.
Asked by joshiraghavendra53 | 3rd Mar, 2015, 04:58: PM
A convex lens can produce the complete image of the object even though half of the lens is covered. This is because light coming from the object can be refracted from the other half of the lens. However, the intensity of light will be reduced.
Answered by Romal Bhansali | 4th Mar, 2015, 12:35: PM
- Please answer this
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- Explain about lenses
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- A 4.0 cm tall object is placed perpendicular ( e.at 90) to the principal axis of a convex lens of food length 10 cm . The distance of the object from the lens is 15cm. Find the math, position and size of the image.Also find its magnification.
- Why is object placed between 2f1 and f1 in a convex lens projector ?
- 35. A student focuses the image of a candle flame, placed at about 2 m from a convex lens of focal length 10 cm, on a screen. After that he moves gradually the flame towards the lens and each time focuses its image on the screen. (A) In which direction does he move the lens to focus the flame on the screen? (B) What happens to the size of the image of the flame formed on the screen? (C) What difference is seen in the intensity (brightness) of the image of the flame on the screen? (D) What is seen on the screen when the flame is very close (at about 5 cm) to the lens?
- How many types of image forms due to lenses ? What are those ? Mention the differences
- An object 50cm tall is placed on the principal axis of a convex lens.Its 20cm tall image
- How does the size of image change as the object is brought from closer to infinite towards the convex lens?
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