NCERT Solutions for Class 8 Science
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NCERT Solutions for Class 8 Science Chapter 16
A polished wooden table has a smooth surface. When we peep through the hole, we will be able to see a variety of patterns in the tube. Visit to of the page. Take another sheet and place it on the table in contact with the vertical mirror. Answer: The kaleidoscope is a simple toy that uses the idea of multiple images formed by the combination of plane mirrors.
Chapter 16 Light
To increase the amount of light, the pupil expands. Answer 1 We can see any object, when light reflected by that object reaches to our eyes. . Similarly, in activity below, as the incident ray, the normal at the point of incidence and the reflected ray all lie in the same plane, we can clearly see the glare of led torch Question 6. Two mirrors meet at right angles.
Chapter 16. LIGHT
Does diffused reflection mean the failure of the laws of reflection? Download links are at the end of online solutions of each chapter. In dim light, the amount of light entering the eye is very little. Draw a normal line on the second sheet from the mirror. Answer: If we are in a dark room, then it is not possible for us to see objects in the room. The tube is slightly longer than the mirror strips. Can you see objects in the room? Therefore, diffused reflection will take place from chalk powder.
class eight science light reflection ncert solution part 2
In regular reflection, all reflected rays are parallel to each other for parallel incident rays. The other option is to learn through our live learning android app. Answer 1: The principal focus of concave mirror is a point on its principal axis at which a beam of light parallel to the principal axis actually converges after reflection from the mirror. It takes place from a smooth or regular surface It takes place from a rough surface 3. Remove the mirror and draw a perpendicular on the mirror line. The ratio n2 is called refractive index of the second medium with respect to the first medium.
CBSE Papers, Questions, Answers, MCQ ...: CBSE
Reflected rays scattered in random directions. Apart from these, students also get to know about the human eye and its different parts like pupil, cornea, iris, retina, etc. Also can he see the image of objects situated at P, Q and R? The ray of light will be reflected if the light rays from the hole are incident on the mirror. Choose the correct option in Questions 7 — 8 Question 7. Answer: iii 6 m In the case of a plane mirror, the distance between the object and the mirror d 1 is same as the distance between the image and the mirror d 2.
class eight science light ncert solution part 1
So, when a beam of light reflects from it, a regular reflection will take place. So, the distance between the person and its image appears to be 2 m. Does diffused reflection means the failure of the laws of reflection? Answer 2: i A convex mirror is preferred as a rear-view mirror because a It always forms an erect, virtual and diminished image of an object placed anywhere in front of it. How ever, out side the darkroom, in open, we can easily see the objects, due to either reflected light from the surface of illuminated objects or direct light from luminous objects such as Sun, candle, torch etc. Question 16: Boojho stands at A just on the side of a plane mirror as shown in Fig. It indicates that the incident ray, the normal at the point of incidence and the reflected ray all lie in the same plane. A polished wooden table has a smooth surface.
NCERT Solutions for Class 8th Science Chapter 16 Light
Answer 8 b virtual, behind the mirror and of the same size as the object Question 9 Describe the construction of a kaleidoscope. In dim light, the amount of light entering the eye is very little. He can see the image of objects situated at P, Q as Incident ray, reflected ray and the normal drawn at the point of incidence to the reflecting surface, lie in the same plane. Therefore, it is used to see an enlarged image of teeth by the dentist. Therefore, it will give a regular reflection. In other cases, irregular reflection will take place; because the surfaces are not smooth. All reflected rays are parallel to each other for parallel incident ray.
class eight science light reflection ncert solution part 2
Similarly, we can not see outside objects, sitting inside the darkroom, if there is no opening or passage for any incidental light from out side. Hence, reflections from the polished table will be regular. If there is light present outside the room, then we can see the objects outside the room. The tube is slightly longer than the mirror strips. Can you see objects in the room? Download links are at the end of online solutions of each chapter.
NCERT Solutions for Class 8 Science
Hence, diffused reflection will take place from a cardboard surface. When the person is standing 1m away from the mirror, its image is also 1 m away. It can be observed that the given ray of light will reflect from the second mirror at an angle 60°. Choose the correct option in Questions 7 — 8 7. The image is as far behind the mirror as the object is in front of it. On this glass plate several small pieces of coloured glass is placed to form multiple images.
NCERT Solutions for Class 8 Science Light
Answer: Construction of a kaleidoscope: Three rectangular mirror strips of dimensions 15cm × 4cm l × b are joined together to form a prism fig a. Does diffused reflection mean the failure of the laws of reflection? Answer A plane mirror forms a virtual image behind the mirror. Visit main page or of the page. The image of a person 1m in front of a mirror is 1m back to the mirror. But in the dark room, no light is reflected by the object so we are unable to see objects in dark room. You can easily observe the incident ray, reflected ray and the normal to the mirror at the point of incidence on the sheet placed on the table. Laterally inverted image image of left side visible on right side.