Light-Energy, Uses, Importance, Characteristics and Sources PPT

Light energy is a form of energy that is visible to the human eye and travels in waves.

1. Light Energy Presented by: Macabenta, Eco, Balbarino

2. What is light energy? Light energy is a form of energy that is visible to the human eye and travels in waves.

3. Importance of Light Energy Light energy helps us see things around us and is essential for life on Earth

4. Importance of Light All living things needs light.

5. Characteristics of Light Energy Travels in straight lines Can be reflected, refracted, or absorbed Can be produced by natural sources like the sun or artificial sources like light bulbs

6. Sources of Light Energy Artificial Light Source

7. Sources of Light Energy

8. Artificial Light Source

9. How light moves Light travels in straight lines called rays. When an object blocks the path of light, it creates a shadow. Light can also bend when passing through different materials, which is called refraction.

10. Light travels in a form of Waves

11. Reflection of Light Reflection occurs when light bounces off a surface. Example: A mirror reflects light, allowing us to see our reflection. Experiment: Use a mirror to demonstrate reflection.

12. Refraction of Light Refraction is the bending of light as it passes from one material into another. Example: When light passes through water, it appears to bend. Experiment: Place a pencil in a glass of water and observe how it appears bent.

13. Absorption of Light Definition: Absorption happens when light is taken in by an object instead of being reflected or transmitted through it. Example: Dark-colored objects absorb more light than light-colored objects. Experiment: Compare how different colored papers absorb light.

14. Uses of Light Energy Seeing: Light helps us see objects and navigate our surroundings. Energy: Light can be converted into electricity through solar panels. Communication: Light is used in technologies like lasers for communication and data transmission.

15. Conclusion Recap: Light energy is a form of energy that travels in waves and is visible to the human eye. Importance: It helps us see, provides energy, and enables communication.

16. Keep exploring and learning about the wonders of light energy!

17. Any Question???

18. Question 1: What is light energy? a) Energy that comes from the sun only b) Energy that helps us see things and travels in waves c) Energy that is only produced by artificial sources Question 2: Which of the following is NOT a characteristic of light energy? a) Travels in straight lines b) Can be absorbed, reflected, or refracted c) Can only be produced by natural sources Question 3: What is refraction? a) When light bounces off a surface b) When light is absorbed by an object c) When light bends as it passes through different materials Question 4: Which object reflects light so we can see our reflection? a) A mirror b) A piece of paper c) A glass of water

19. Question 5: What is the importance of light energy? a) It helps us see, provides energy, and enables communication b) It only helps us see objects c) It is not important in our daily lives Question 6: What happens when an object blocks the path of light? a) It creates a rainbow b) It produces heat c) It creates a shadow Question 7: How does light travel? a) In zigzag lines b) In curved lines c) In straight lines Question 8: Which color objects absorb more light? a) Dark-colored objects b) Light-colored objects c) Both absorb the same amount

20. Question 9: What is reflection? a) The bending of light as it passes from one material into another b) When light is absorbed by an object c) When light bounces off a surface Question 10: How can light energy be converted into electricity? a) Through solar panels b) Through batteries c) Through wind turbines

21. Answers: b) Energy that helps us see things and travels in waves c) Can only be produced by natural sources c) When light bends as it passes through different materials a) A mirror a) It helps us see, provides energy, and enables communication c) It creates a shadow c) In straight lines a) Dark-colored objects c) When light bounces off a surface a) Through solar panels

22. Thank you! 