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Slide show 2 Session 2
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Photograph of a spermatozon seen through a microscope
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The previous document shows a spermatozon, it is:
(1) a real size object (2) an image of a spermatozon (3) a diagram of a spermatozon (4) a picture of a spermatozon (5) a model of a spermatozon
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Image, object, real size, drawing?
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Chose the good word in order to complete the sentence:
I see on the slide …….. of a spermatozon (1) details (2) elements (3) components (4) parts
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When observing a spermatozon with a microscope, we see it larger because
(1) the microscope modifies the spermatozon stuff (2) the microscope modifies the light path coming from the spermatozon (3) the microscope modifies the eye properties of the observer.
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Understanding the action of a lens Experience with an optical bench
Vocabulary/write on the drawing the words: object, lens, screen, image Direction of the light
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Experiment with the optical bench
- Place the lamp at the end of the optical bench. - Connect the lamp to the 6V generator - Call the teacher for a verification - Observe to the naked eye the letter F, measure its height and place it on the optical bench - Put the lens in place …. and move the screen until the image of the letter becomes clear-cut. - Observe the image and measure its height
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- Place a diaphragm in front of the letter F
- Observe the image. What happened?
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