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Pin Hole Camera & Shadow Concepts

The document contains questions about the formation of images in a pinhole camera, the formation of shadows and umbra, and different types of eclipses. It asks about how changing factors like the size of the pinhole or distance of the object affects the image. It also asks about the differences between umbra and penumbra, and diagrams showing the formation of shadows, umbra, and lunar and solar eclipses.

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Amit Kumar Lal
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52 views1 page

Pin Hole Camera & Shadow Concepts

The document contains questions about the formation of images in a pinhole camera, the formation of shadows and umbra, and different types of eclipses. It asks about how changing factors like the size of the pinhole or distance of the object affects the image. It also asks about the differences between umbra and penumbra, and diagrams showing the formation of shadows, umbra, and lunar and solar eclipses.

Uploaded by

Amit Kumar Lal
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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Question 21.

Explain the formation of image of a luminous object in a pin hole camera with the aid of a neat diagram.
Question 22. State two factors which affect the size of image formed in a pin hole camera.
Question 23. Is the image obtained in a pin hole camera erect or inverted ? Give reason for your answer.
Question 24. How is the image affected in a pin hole camera when another fine hole is made near the first pin hole ?
Question 25. State the effect on the image in a pin hole camera if
i. The hole is made bigger.
ii. The luminous object is moved towards the pin hole.
iii. The length of the pin hole camera is increased (le. the screen is moved away from the pin hole).
Question 26. What is a shadow ? Give a reason for its formation.
Question 27. Draw a ray diagram to show the formation of shadow of an opaque object by a point source of light. How is
the size of shadow affected if the screen is moved away from the object?
Question 28. State two differences between an umbra and a penumbra.
Question 29. Draw a ray diagram to show the formation of umbra alone.
Question 30. Draw a ray diagram to show the formation of umbra and penumbra both. Label the parts umbra and
penumbra in your diagram.
Question 31. In each of the following diagrams, draw rays to form umbra and penumbra on the screen.
(a) (b)

Question 32. State the conditions when only the penumbra of an opaque object is obtained on the screen.
Question 33. Why is it that the birds flying in the sky do not cast their shadow on the earth ?
Question 34. Why are shadows at noon shorter than in the morning or in the evening ?
Question 35. What is an eclipse ? Name the two types of eclipses.
Question 36. When does a lunar eclipse take place ? Does it occur on every full moon’s night ?
Question 37. Draw a diagram to show the formation of lunar eclipse.
Question 38. When does a solar eclipse take place ? Does it occur on even’ new moon’s day ?
Question 39. Draw a diagram to show the formation of solar eclipse.
Question 40. What is annular solar eclipse ? Draw a labelled diagram to show its formation.

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