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Light Shadows and reflections (view source)
Revision as of 11:19, 4 December 2023
, 11:19, 4 December 2023→Resources:
=== Resources: ===
=== Resources: ===
Video, PDF file, Simulation, worksheet'''Introduction:'''
Begin class by asking students what are the things that they see in their surrounding, and how do they think they get to see those things? Can you see those things at night as well? Can you see those things when the lights were switched off?
Begin class by asking students what are the things that they see in their surrounding and how do they think they get to see those things? Can you see those things at night as well? Can you see those things when the lights were switched of?
Discuss and introduce luminous and non-luminous substances.
Discuss and introduce luminous and non-luminous substances.
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https://www.arvindguptatoys.com/toys/Pinholecamera.html. Discuss the following questions with children.
Drag the cursor down on the above resource to get the complete view of it.
https://www.arvindguptatoys.com/toys/Pinholecamera.html.
'''Discuss the following questions with children.'''
Why is the image seen in pinhole camera is inverted?
* Why is the image seen in pinhole camera is inverted?
EA: Light from the top of the object after passing through the pinhole reaches the bottom of the camera screen, and light from the bottom of the object passing through the pinhole reaches the top of the screen. This causes the inversion of the image.
EA: Light from the top of the object after passing through the pinhole reaches the bottom of the camera screen, and light from the bottom of the object passing through the pinhole reaches the top of the screen. This causes the inversion of the image.
What happens when the size of the hole in a pinhole camera is made bigger?
* What happens when the size of the hole in a pinhole camera is made bigger?
EA: When the size of the hole in a pinhole camera is made bigger, then the sharpness of the image obtained decreases. Also, the image becomes thick and blurry. This is because as the size of the hole increases, the amount of light entering the box increases, disturbing the formation of the image.
EA: When the size of the hole in a pinhole camera is made bigger, then the sharpness of the image obtained decreases. Also, the image becomes thick and blurry. This is because as the size of the hole increases, the amount of light entering the box increases, disturbing the formation of the image.
Have you ever experienced or come across a pin-hole in nature?
* Have you ever experienced or come across a pin-hole in nature?
[[Category:TIEE Science]]
[[Category:TIEE Science]]