reflection of light ppt.ppt
- 2. TRY THIS! Task: Think and Pick Directions: Read and analyze each statement carefully and choose the letter of the correct answer. 1. When light hits a smooth surface, it is _______________. A. bent around corners B. polarized C. reflected D. refracted
- 3. 2. The image in a plane mirror is always A. erect but reversed B. erect but not reversed C. inverted but reversed D. inverted but not reversed
- 4. 3. What kind of image is formed by a plane mirror? A. real image B. virtual image C. multiple image D. none of these
- 5. 4. Which of these is NOT the property of an image formed by a plane mirror? A. The image obtained is virtual B. The image is laterally inverted. C. The image is erect. D. The size of the image is smaller than the size of the object.
- 6. 5. When the image of an object is seen in a plane mirror, the distance from the mirror to the image depends on ____. A. the wavelength of light used for viewing. B. the distance from the object to the mirror. C. the distance of both the observer and the object to the mirror. D. the size of the image
- 7. ANSWER! (Try This) 1. C 2. A 3. B 4. D 5. B
- 8. How do we see objects around us?
- 9. Will our eyes be able to see in the dark?
- 11. A luminous object is one that produces light. An illuminated object is one that reflects light. Luminous Objects Illuminated Objects LUMINOUS AND ILLUMINATED OBJECTS
- 12. We see things because they reflect light into our eyes: Homework
- 13. 4 PICS 1 WORD REFLECTION
- 14. Activity: MIRROR, MIRROR ON THE WALL THE MAN IN THE MIRROR
- 15. Activity: MY IMAGE AND ME Directions: Analyze the nature of image formed by a plane mirror.
- 16. 1. What is the size of image formed by a plane mirror? - same size as the object
- 17. 2. What type of image is formed by plane mirrors? - virtual image
- 18. 3. Where is the image of an object in a plane mirror? - behind the mirror
- 19. 4. Compare the distance of the man to the mirror and the distance of his image from the mirror. - the distance of the man from the mirror is the same as the distance of his image from the mirror.
- 20. REFLECTION OF LIGHT • Reflection is the bouncing off light rays when it hits a smooth surface • Example: a reflection in a mirror.
- 21. 2 TYPES OF IMAGES FORMED BY REFLECTING SURFACE • REAL IMAGE - always inverted and is formed by actual rays of light. It appears in front of the mirror and can be projected on the screen. • VIRTUAL IMAGE - always erect and formed by apparent rays of light. Virtual image appears behind the mirror.
- 22. PROPERTIES OF AN IMAGE FORMED BY PLANE MIRROR • The image obtained is virtual. • The image is erect. • The size of the image is the same as the size of the object. • The distance between the image obtained is the same as the distance between the object from the mirror.
- 23. Characteristics of Image Formed in a Plane Mirror
- 24. REFLECTION FROM A MIRROR: Incident ray Normal Reflected ray Angle of incidence Angle of reflection Mirror
- 25. The Law of Reflection Angle of incidence = Angle of reflection The same !!! The incident ray, normal line and the reflected ray all lie in the same plane
- 27. Activity: HOW DO I LOOK? Directions: Analyze the given pictures below and answer the questions that follow. A. B.
- 28. APPLICATION 1. What do you think is the reason why an “AMBULANCE” word is written in reverse in an ambulance car? - so that the driver of any vehicle in its front can instantly read the inverted word in their rearview mirror and give way on an emergency.
- 29. APPLICATION 2. How do you write the word “AMBULANCE” when seen in front of a plane mirror?
- 30. ASSESS WHAT YOU HAVE LEARNED 1.What law states that angle of incidence is equal to the angle of reflection? A. Law of Inertia B. Law of Reflection C. Law of Acceleration D. Charles’ Law
- 31. 2. If you stand three feet in front of a plane mirror, how far away would you see yourself in the mirror? A. 1.5 ft B. 3 ft C. 6 ft D. 12 ft
- 32. 3. Which of the following best describes the image formed by a plane mirror? A. virtual, inverted and enlarged B. real, inverted and reduced C. virtual, upright and the same size as object D. real, upright and the same size as object
- 33. 4. When the image of an object is seen in a plane mirror, the distance from the mirror to the image depends on _____. A. the wavelength of light used for viewing. B. the distance from the object to the mirror. C. the distance of both the observer and the object to the mirror. D. the source of light.
- 34. 5. All of these are properties of an image formed by a plane mirror except A. The image obtained is virtual. B. The image is erect. C. The size of the image is bigger than the size of the object D. The distance between the image obtained is same as the distance between the object from the mirror.
- 35. ASSIGNMENT 1. What are the two kinds of curved mirror? 2. Observed the images formed by the two kinds curved mirrors. Write at least three of your observations in your notebook.