Mirrors-ppt.pptx

Pre-assessment  1 What type of reflection occurs when light bounces off a smooth surface, such as a mirror, in a specific direction? a. Diffused reflection b. Irregular reflection c. Regular reflection d. Specular reflection ...

Pre-assessment  1 What type of reflection occurs when light bounces off a smooth surface, such as a mirror, in a specific direction? a. Diffused reflection b. Irregular reflection c. Regular reflection d. Specular reflection  2 Why does the image in a mirror appear to be laterally inverted (left and right reversed)? a. The mirror surface is not smooth. b. The mirror is tilted. c. It's an optical illusion. d. Due to the principles of reflection.  3 In a flat or plane mirror, where does the brain perceive the virtual image to be located? a. In front of the mirror b. Inside the mirror c. Behind the mirror d. Above the mirror  4 What is the primary difference between concave and convex mirrors? a. Concave mirrors converge light; convex mirrors diverge light. b. Concave mirrors have a flat surface; convex mirrors have a curved surface. c. Concave mirrors only reflect diffused light; convex mirrors only reflect focused light. d. Concave mirrors are used for magnification; convex mirrors are used for shrinking images.  5 Which mirror type is commonly used for side mirrors in vehicles and wide-angle mirrors for safety? a. Concave mirror b. Convex mirror c. Plane mirror d. Spherical mirror  Answers 1. C. Regular reflection 2. D. Due to the principles of reflection 3. C. Behind the mirror 4. A. Concave mirrors converge light; convex mirrors diverge light. 5. B. Convex mirror Mirrors and Lenses  Reflection Reflection is the bouncing back of light or other waves when they encounter a surface that does not absorb them. This bouncing back can occur at different angles depending on the type of surface.  Law of Reflection The law of reflection states that when a ray of light is reflected off a surface, the angle of incidence is equal to the angle of reflection. Law of Reflection  Regular/Specular Reflection Regular or specular reflection is when light or waves bounce off a smooth surface in a specific direction, like the reflection in a mirror. It creates a well- defined and organized  Irregular/Diffused Reflection Irregular or diffused reflection occurs when light or waves bounce off a rough or uneven surface, scattering in various directions. Unlike regular reflection, there's no specific angle of reflection, leading to a less organized and diffused Regular/Specular Reflection Regular/Specular Reflection Regular/Specular Reflection Irregular/Diffused Reflection Irregular/Diffused Reflection  Mirrors In science, mirrors are surfaces that reflect light, allowing us to see images of objects. They're made by coating smooth materials like glass with reflective substances. Mirrors are used in scientific instruments, like microscopes and telescopes, to manipulate and observe light. They play a crucial role in optics and various scientific experiments involving the reflection of light.  Plane Mirrors A plane mirror is a flat and smooth reflective surface that reflects light in a way that preserves the relative proportions and orientations of objects. It is often called a "flat mirror" because its Characteristics formed by Plane Mirrors Image Orientation Location Size/Magnification  Image The image we see in mirrors is virtual because it appears to be located behind the mirror, even n though there is no actual object or light source behind it.  Orientation The lateral inversion, or left- right reversal, of the image in a mirror is a result of the way light reflects off the mirror surface. As a consequence of this reflection process, the left side of the object reflects to the right side in the mirror, and vice  Lateral Inversion Lateral inversion refers to the phenomenon where the left and right sides of an object or image appear reversed when viewed in a mirror. In other words, the orientation along a horizontal axis is flipped. Lateral Inversion  Location and Size/Magnification The size and distance of the object’s reflection in the mirror appear the same as the size and distance of the actual object. The brain processes the reflected light in a way that maintains the relative proportions, creating the illusion of a virtual image behind the mirror that corresponds closely to the actual object in  Curved Mirrors Curved mirrors are reflective surfaces that have a curved or spherical shape. There are two primary types of curved mirrors: concave  Concave/Converging Mirrors A concave mirror is a curved mirror where the reflecting surface is on the inner side of the curved shape. It has a surface that curves inward, resembling the shape of the inner  Shape Concave mirrors curve inward, creating a surface that is reflective on the inner side. The inner side of a spoon or the inside of a bowl can serve as a simple example of a concave  Reflective Properties These mirrors can converge incoming parallel light rays to a focal point, resulting in real or virtual images depending on the object's position relative to the  Uses Concave mirrors can produce magnified images. Used in applications like makeup mirrors, shaving mirrors, and some types of reflecting telescopes.. Concave Mirrors  Concave/Diverging Mirrors A convex mirror is a curved mirror where the reflective surface bulges out toward the light source. This bulging-out surface reflects light outwards and is not used to focus light.  Shape Convex mirrors curve outward, creating a reflective surface on the outer side. The side mirrors on vehicles often have a convex shape.  Reflective Properties These mirrors diverge incoming parallel light rays, making the reflected rays appear to be coming from a virtual focal point behind the mirror. Because of their structure, they cannot focus  Uses Convex mirrors provide a wider field of view. Used in applications like side-view mirrors in cars, security mirrors, and in stores to eliminate blind spots. Convex Mirrors Post-assessment  1 What is the primary characteristic of a plane mirror's surface? a. Curved b. Textured c. Smooth and flat d. Transparent  2 Why does a flat or plane mirror create a virtual image? a. Due to refraction b. Due to diffraction c. Due to interference d. Due to the principles of reflection  3 What kind of reflection occurs when light bounces off a rough surface? a. Regular reflection b. Specular reflection c. Diffused reflection d. Irregular reflection  4 What is lateral inversion in the context of mirrors? a. Vertical reversal of an image b. Left-right reversal of an image c. Size reduction of an image d. Change in color of an image  5 Which mirror type is commonly used in rearview mirrors of cars? a. Concave mirror b. Convex mirror c. Plane mirror d. Spherical mirror  Fill In The Blanks Reflection is the (6)____ back of light or other waves when they encounter a surface that does not (7)____ them.  Fill In The Blanks Irregular or diffused reflection occurs when light or waves bounce off a (8)_____ or (9)_____ surface, scattering in various directions.  Fill In The Blanks Lateral inversion refers to the phenomenon in which the orientation along a (10)_____ axis is flipped.