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UNIT IV- AUDIO-VISUAL ACTIVITIES
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Specific Objectives
Students should be able to:
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Explanatory notes
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Suggested Practical Activities
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1
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*identify the applications of rectilinear propagation, reflection and refraction in simple optical devices and natural phenomenon
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Simple qualitative treatment only; image formation by projector; headlamps, reflector, mirrors; image formation
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Activities using plane and curved mirror and lenses. simple qualitative treatment only
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2
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Describe how to separate white light into its component colours;
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Glass or water prisms can be used.
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3
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Differentiate between primary and secondary colours; |
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4
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Discuss the effects produced by mixing various combinations of primary pigments; |
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Separation of different coloured inks by chromatography.
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| 5 |
Discuss the effects produced by mixing various combinations of primary coloured lights |
Stage lighting, colour TV and colour photography, painting and dyeing |
Colour wheel or ray boxes with filters. |
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Discuss the application of color mixing principles; |
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Perform solvent extraction , use of alcohol |
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*describe techniques for extracting products such as dyes from the natural sources |
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Perform simple experiments to demonstrate photochemical reactions |
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Describe photochemical reactions such as occur in photosynthesis and photography |
‘blueprint’ paper, or paper treated with silver chloride placed in sunlight |
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| 9 |
* compare notes (frequencies) produced by different types of musical instruments |
“Quality” (timbre) |
Use stringed, wind and percussion instruments with special emphasis on Caribbean instruments for example, steel drum. Carry out and describe simple investigation on pitch and loudness |
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Describe the factors affecting pitch and loudness; |
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| 11 |
Identify the position of radio waves in the electromagnetic spectrum; |
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Use chart of electromagnetic spectrum |
| 12 |
Explain the use of medium and short waves in broadcasting |
The consequences of using AM or FM broadcasting; |
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| 13 |
Distinguish between AM and FM |
Quality of broadcast and range of reception. |
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| 14 |
Discuss the hazards of radios, television sets and other equipment that operate from the mains |
Radiation and voltage hazards. |
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Go to Section D: TRANSPORTATION
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