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Solve Exercise C1 on page 22 Physics Grade 7 textbook
Problem statement:
What is the image of the candle observed in the concave mirror in the experiment? Is the image larger or smaller than the candle?
Solution:
The image of the candle observed in the concave mirror is a virtual image.
The image is larger than the candle.
Solution to Exercise C2 on page 22 of Physics Grade 7 Textbook
Problem Statement:
Arrange an experiment to compare the virtual image of an object created by a concave mirror with the image of the same object created by a flat mirror. Describe the setup of the experiment. Provide the comparison results.
Conclusion:
Conclusion:
Solution:
- Experiment Setup: Place two identical candles vertically in front and equidistant from both mirrors (flat mirror and concave mirror).
- Comparison Result: The virtual image of an object created by the concave mirror is larger than the virtual image of the same object created by the flat mirror.
Conclusion: When placing an object near a concave mirror, looking into the mirror, you see a virtual image that cannot be captured on a screen and is larger than the object.
Solving Exercise C3 on page 23 of Physics Grade 7 textbook
Problem statement:
Observe the bundle of reflected rays and identify its characteristics.
Conclusion:
When a parallel beam of light is directed onto a concave mirror, we obtain a bundle of reflected rays converging at a point in front of the mirror.
Solution:
- Reflected rays converge (converge) at a point in front of the mirror.
- Conclusion: When shining a beam of light parallel to a concave mirror, we obtain a bundle of converging reflected rays at a point in front of the mirror.
Solving Exercise C4 on page 23 of Physics Grade 7 textbook
Problem statement:
Figure 8.3 is a device that uses a concave mirror to focus sunlight to heat an object. Explain why the object heats up.
Solution:
The Sun is very far away, so the beam of light from the Sun to the concave mirror is considered parallel, resulting in a bundle of reflected rays converging at a point in front of the mirror. Sunlight carries a large amount of thermal energy, so an object placed at the point where the bundle of light converges will heat up.
Solving Exercise C5 on page 23 of Physics Grade 7 textbook
Problem statement:
By moving the flashlight, find the position of S to obtain a reflected beam that is a parallel beam of light.
Conclusion:
A small light source S placed in front of the concave mirror at an appropriate position can produce a beam of rays ... parallel.
Solution:
Conclusion: A small light source S placed in front of the concave mirror at an appropriate position can produce a bundle of reflected rays that are parallel.
Solution for Exercise C6 on page 24 of Physics Grade 7 textbook
Problem statement:
Rotate the flashlight to the appropriate position to obtain a bundle of parallel reflected rays emitted from the flashlight.
Explain why a flashlight can shine brightly at a distance when equipped with a concave lens?
Solution:
Inside the flashlight, there is a concave lens. Therefore, when the flashlight is rotated to an appropriate position, the diverging beam emitted from the flashlight will be transformed into a bundle of parallel reflected rays by the concave lens (inside the flashlight). The energy of the parallel beam of light is lost less when transmitted over long distances, hence the light remains bright even at a distance.
Solution for Exercise C7 on page 24 of Physics Grade 7 textbook
Problem statement:
To obtain a converging beam of light from the flashlight, should the flashlight be rotated to make the bulb move closer to or farther from the mirror?
Solution:
To obtain a converging beam of light from the flashlight, we need to rotate the flashlight to make the bulb move closer to the mirror.
Chapter I Optics, students learn about Sound Source, check out hints for solving exercises on pages 28, 29 Physics Grade 7 to study Physics 12 effectively.
Chapter 1 Summary: Optics is the next part of Chapter I Optics Physics Grade 7 Class 11, also check out hints for solving exercises on pages 25, 26 Physics Grade 7 to grasp the knowledge and study Physics 7 effectively.
