LIGHT.pptx
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This document discusses light reflection and refraction using mirrors and lenses. It introduces key concepts like the electromagnetic spectrum, reflection, refraction, and optical instruments. The learning objectives are to understand and apply the qualitative and quantitative characteristics of images formed by plane and curved mirrors and lenses, including location, orientation, type and magnification of images. Key concepts defined include incident rays, reflected rays, normals, and the laws of reflection. The document aims to explain how mirrors and lenses work and their uses in devices like cameras and telescopes.
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This document discusses lenses and their effects on light. It explains that a converging lens brings parallel beams of light to a focal point, forming a real image. A diverging lens causes parallel beams to diverge, with a virtual focal point behind the lens. Real and virtual images are formed by converging lenses using ray diagrams and optical rules. Applications like cameras and magnifying glasses are also covered.Optics basics concepts
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1) The document discusses key concepts in optics, including geometrical optics, physical optics, and quantum optics.
2) Geometrical optics deals with light rays and concepts like reflection and refraction. Physical optics examines light as waves and topics such as interference and diffraction. Quantum optics views light as particles.
3) Images formed by a concave mirror depend on the object's location relative to the mirror's center of curvature and focal point. If beyond the center, the image is real, inverted, and smaller.Dr Md Anisur Rahman Optics basics concepts
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1) The document discusses key concepts in optics, including geometrical optics, physical optics, and quantum optics.
2) Geometrical optics deals with light rays and concepts like reflection and refraction. Physical optics examines light as waves and phenomena like interference and diffraction. Quantum optics views light as particles.
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1) Light can be reflected, absorbed, or refracted. When light reflects off a flat surface, the law of reflection states that the angle of incidence equals the angle of reflection.
2) A mirror forms a virtual image that is located behind the mirror on the opposite side of the object. The image distance from the mirror is equal to the object distance from the mirror.
3) Spherical mirrors can be either converging or diverging. A converging mirror focuses parallel light rays to a focal point in front using ray diagrams to determine the characteristics of the real image formed.
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- 2. INTRODUCTION In the previous lesson, you learned about EM spectrum. You gained an understanding of the different EM waves and their benefits. One of the most common among these EM waves is the visible light.
- 3. INTRODUCTION In the previous lesson, you learned about EM spectrum. You gained an understanding of the different EM waves and their benefits. One of the most common among these EM waves is the visible light. In this lesson, you will study two of the properties of visible light- reflection and refraction.
- 4. LEARNING COMPETENCIES/ OBJECTIVES: 1. Predict the qualitative characteristics (location, orientation, type, and magnification) of images by plane and curved mirrors and lenses. 2. Determine the quantitative characteristics (location, orientation, type, and magnification) of images by plane and curved mirrors and lenses. 3. Distinguish between converging and diverging mirrors and lenses. 4. Apply ray diagramming techniques in describing the characteristics and positions of images formed by mirrors and lenses. 5. Derive the mirror and lens equations. 6. Identify ways in which the properties of mirrors and lenses determine their use in optical instruments (e.g., cameras and telescopes)
- 5. What did you observe on the word AMBULANCE?
- 6. What did you observe on the word AMBULANCE? How is it written?
- 7. What did you observe on the word AMBULANCE? How is it written? Did you ever wonder why it is written that way?
- 10. REFLECTION The bouncing off of light rays when it hits a surface like a plane mirror. (Dictionary) noun. the act of reflecting, as in casting back a light or heat, mirroring, or giving back or showing an image MAGNIFICATION Formula: M= h = -q h p WHERE: M- Magnification h- height of the image h- height of the object -q- image distance p- object distance
- 12. INCEDENT RAY The ray of light approaching the mirror represented by an arrow approaching an optical element like mirrors.
- 13. REFLECTED RAY The ray of light which leaves the mirror and is represented by an arrow pointing away from the mirror.
- 14. NORMAL LINE An imaginary line that can be drawn perpendicular to the surface of the mirror at the point of incidence where the ray strikes the mirror.
- 15. LAWS OF REFLECTION 1. The incident ray, the normal and reflected ray, all lie in the same plane 2. The angle of incidence is equal to the angle of reflection.