lesson plans in science 10 - lessonguide (images in lenses)
TRANSCRIPT
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“YOU CAN BE MAGNIFIED”Images formed in Convex Lens
Objectives:1. Measure the focal length and linear magnification of a
convex lens.2. Locate the image formed by convex lens.3. Describe the image formed by convex lens.
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*Terms to be remembered:1. Focal Length – is the distance from the surface of a
lens to the focus. It is also known a the distance from the lens at which light rays are concentrated at a single point/dot.
2. Linear magnification – is the visual measure of the object’s image size when viewed using the lens.
3. Virtual image – object’s image is located behind the lens.
4. Real image – object’s image is located in front of the lens.
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How light behaves…
REFLECTION REFRACTION
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REFRACTION OF LIGHT…*It is described as…- ability of light rays to enter/pass a certain medium like glass.
*Light…- bends to a certain direction.
*Happens only in… - it strikes a clear/transparent medium.
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BEST EXAMPLE OF MEDIUM WHERE LIGHT CAN PASS THROUGH ARE GLASSES.
These includes… LENSES
CONVEX
CONCAVE
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LENSES ARE USED IN OPTICAL INSTRUMENTS
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DID YOU HAVE ANY PAST PERSONAL EXPERIENCES ON USING LENSES SPECIFICALLY
“CONVEX LENS”
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HOW ABOUT THIS…?
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“YOU CAN BE MAGNIFIED”Activity No. 7 pp. 195-197 Learner’s Material
• List of Materials• Procedures 1 - 9. (Listen to some revised setup.)• Table of Observed Data (p. 197)• Questions to answer. (Q17, 18, 19, 20)
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“YOU CAN BE MAGNIFIED”Activity No. 7 pp. 195-197 Learner’s Material
• Procedures 1 - 9. (emphasis…)
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DISCUSSIONS OF RESULTS/OBSERVATIONS
Q17. What is the focal length of the convex lens assigned in your group?
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“YOU CAN BE MAGNIFIED”Activity No. 7 pp. 195-197 Learner’s Material
• Procedures 1 - 9. (for distant object)
distant object
lens screen
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DISCUSSIONS OF RESULTS/OBSERVATIONS
How would you describe the image formed if a distant object is used?
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“YOU CAN BE MAGNIFIED”Activity No. 7 pp. 195-197 Learner’s Material
• Procedures 1 - 9. (LM Setup. Use cm units.)
q lens p
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“YOU CAN BE MAGNIFIED”Activity No. 7 pp. 195-197 Learner’s Material
• Tabular Data. (as seen in LM p.197)
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“YOU CAN BE MAGNIFIED”Activity No. 7
pp. 195-197 Learner’s Material
• Based on the data obtained, associate the measurement of distances to:
(f = lens focus, p = object’s distance, and q = eye distance)
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DISCUSSIONS OF RESULTS/OBSERVATIONS
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TO SUMMARIZE…
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TEST YOUR LEARNING…
LENS to
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ANSWER TO THE TEST…
LENS to
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