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Slide show 2 Session 2

Explore a photograph, image, diagram, and model of a spermatozon through a microscope. Understand the modifications caused by the microscope and learn about the action of a lens. Experiment with an optical bench to observe and measure images.

ronbennett
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Slide show 2 Session 2

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  1. Slide show 2 Session 2

  2. Photograph of a spermatozon seen through a microscope

  3. (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 The previous document shows a spermatozon, it is:

  4. Image, object, real size, drawing?

  5. 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

  6. 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.

  7. 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

  8. 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

  9. - Place a diaphragm in front of the letter F • - Observe the image. What happened?

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