angle of reflection equals angle of incidence

Totally lost? Then it's time to bust out our inner Picasso and a draw a picture. These objects still reflect all of the individual light rays as described by the law of reflection, but because the surface the light rays hit is uneven, they are not all reflected back at the same angle.

Objects that partake in diffuse reflection (almost everything, even you) are uneven. All of the things we see that are not shiny or 'reflective,' are the result of diffuse reflection. The second type of reflection is what happens with most objects. We'll talk more about mirrors in the next In Depth Section. Specular reflection is the principle behind 'shiny.' And at its best, as in the case of mirrors, it generates a reflection. A perfectly flat surface reflects incoming parallel light rays in such a way that they all stay parallel. Specular reflection is what a mirror does or what we see on perfectly flat water. The next thing to know about reflection is that we distinguish between two different kinds: specular reflection and diffuse reflection. The angles of incidence and reflection are the angles between the light's direction and the normal. Are we imagining? So we're all imagining a line perpendicular to the surface of the reflecting object, we call this perpendicular line the normal. Instead, to define these angles, we have to imagine a line sticking straight out of the surface of the reflecting object. Since this is physics, these angles are not the angles between the surface of the object and the light ray. Reflection is summarized by…wait for it…the law of reflection.This law says that the angle at which light hits an object, the angle of incidence, θ i, equals the angle at which it reflects from that object, the angle of reflection, θ r. Light does exactly the same thing: it reflects. When the puck (or 8 ball or image) hits a solid object, it changes course, bouncing off at an angle. Every time we've played pool, looked in a mirror, or played ice hockey, reflection was present. 16.23).Reflection is probably the simplest property of light for us to understand because we've had good bit of experience with it. Q.17 (a) Find out the position of the image of an object situated at A in the plane mirror (Fig.Can he see himself in the mirror? Also can he see the image of objects situated at P, Q and R? Q.16 Boojho stands at A just on the side of a plane mirror as shown in Fig.Draw the reflected ray from the second mirror. A ray of light is incident on one at an angle of 30° as shown in Fig. Q.15 Two mirrors meet at right angles.Q.14 How many images of a candle will be formed if it is placed between two parallel plane mirrors separated by 40 cm?.Q.12 Explain how you can take care of your eyes.Can you explain the basis of the teacher’s advise? Q.11 Gurmit wanted to perform Activity 16.8 using a laser torch.Q.10 Draw a labelled sketch of the human eye.

Q.9 Describe the construction of a kaleidoscope.(d) real, behind the mirror and of the same size as the object. (c) real at the surface of the mirror and enlarged. (b) virtual, behind the mirror and of the same size as the object. (a) virtual, behind the mirror and enlarged. Q.7 The angle of incidence is equal to the angle of reflection.(d) Night birds have _ cones than rods in their eyes. (c) The size of the pupil becomes _ when you see in dim light. (b) If you touch your _ ear with a right hand in front of a plane mirror it will be seen in the mirror that your right ear is touched with _ (a) A person 1 m in front of a plane mirror seems to be _ m away from his image. Q.6 Fill in the blanks in the following.Q.5 Describe an activity to show that the incident ray, the reflected ray and the normal at the point of incidence lie in the same plane.(d) Marble floor with water spread over it Q.3 Mention against each of the following whether regular or diffused reflection will take place when a beam of light strikes.Does diffused reflection mean the failure of the laws of reflection? Q.2 Differentiate between regular and diffused reflection.Can you see objects in the room? Can you see objects out¬side the room ? NCERT solutions of related questions for Light

Angle of reflection equals angle of incidence