| Method |
Precise Learning Objective |
Linked |
Question / Activity
(Designed for maximum working out) |
Stepping Stones |
Pitstop Check
(Thinking Map) |
| ES H |
Use of ray model to explain imaging in pinhole cameras. |
|
What does a ray model of a pinhole camera look like? Making Pin hole cameras:
1 small hole
3 small holes
1 large hole
1 large hole lens |
|
|
|
Light transfers energy from source to absorber. |
|
With photosensitive paper where does light transfer from and to? |
|
|
|
The energy absorbed can lead to chemical effects such photosensitive chemicals in photo films. |
|
What things can absorbed light energy do in a polaroid camera lead to? http://www.rsc.org/learn-chemistry/resource/res00000454/making-a-photographic-print?cmpid=CMP00005166 |
|
|
| ES H |
The energy absorbed can lead to chemical changes in cells such as those in the back of the eye.- the retenia. |
|
What can absorbed light energy lead to in the eye? |
|
|
| ES H |
With one small hole, a pinhole camera gives a faint image that is in focus.
This is because only a single ray can enter the camera so there is not much light so the image is dim, but only image is formed so it is clear (focused) image |
|
How does a pinhole camera create a faint image that is in focus? |
|
|
| H |
When light is absorbed by a charged surface, the charge can leak away. |
|
What can happen to a charged surface when light energy is absorbed? DEMO photovoltaic effect (work function) with gold leaf electroscope, Zinc plate & UV lamp?
https://www.youtube.com/watch?v=muxRZ1irsrk |
|
|
| ES H |
With three small holes, a pinhole camera gives three faint image that are in focus.
It works in the same way as a single hole, but a different angle so the images are offset from each other. |
|
Why does having three small holes in a pinhole give three faint images that are in focus? |
|
|
|
Light is refracted first by the cornea and then by the lens. |
|
Where is the light reflected in the eye? |
|
|
| H |
The change in electrical charge can be measured by a circuit to produce a picture. ie a digital camera sensor (CCD) |
|
How can a picture be made using a CCD? Explain using visualiser |
|
|
| ES H |
With a large hole, a pinhole camera gives a bright out of focus image.
A big hole can be thought of as thousands of small holes joined together. So thousand of images are produced on the screen slightly offset from one another forming a blurred, out of focused image. |
|
How does a bigger hole effect the image produced? |
|
|