Title Advanced series 10th class Physics - Solutions.pdf ✅

Class 10 Physics Table of Content 1. Light - Reflection 1 – 20 2. Light - Refraction 21 – 54 3. Current Electricity 55 – 118 4. Magnetic Effects of Electric Current 119 – 167 5. Modern Physics 168 – 185 6. Source of Energy 186 - 190

Class 10 – Physics | A - 10 Light Reflection 1 1. Light Reflection Solutions LEVEL-I 1. Correct option: (D) Light cannot travel through a vacuum is the wrong statement. That "Light cannot travel through a vacuum" is untrue. It is true that light may pass through a vacuum. In reality, it is known that light can travel through empty spaces, including the vacuum of space. This is so because electromagnetic waves, which make up light, may pass across empty space. Therefore, D) Light cannot travel through vacuum is the wrong statement. 2. Correct option: (C) Because only a portion of the incident light is reflected and quite a large portion goes into water. Because just a small fraction of the incident light is reflected and a sizable percentage travels into the water, the images of clouds and trees in water are always darker than they are in reality. A portion of the light is reflected at the surface when it travels from one medium (like air) into another (like water), while the remaining component is transmitted into the water. Since just a portion of the incident light is reflected, the image seems less bright than it would be in reality. The reflected light is what allows us to see the image. 3. Correct option: (C) Convex. In a mirror or window pane, if your face seems larger than usual, it means that the reflecting surface is convex. The surface of a convex mirror or window pane bulges outward, making the reflected image look larger. This results from the way light rays interact with a convex surface, where they reflect and diverge. 4. Correct option: (B) Convex mirror. From a point source of light, a convex mirror can create a parallel beam of light. When light rays from a point source diverge and hit a convex mirror, the reflection causes the light to spread out and give the impression that it is originating from a single virtual point, or focal point, behind the mirror. The reflected light appears parallel as a result, producing a parallel beam. A flat mirror would reflect light without changing its direction, whereas a concave mirror would converge light rays onto a focal point. Therefore, the correct answer is B) Convex mirror. 5. Correct option: (A) Under no circumstances is right answer. The reflected picture in a convex mirror is always virtual, upright, and scaled down. No matter how far the real object is from the mirror, it never creates an inverted image of it. Option B) When the object is very far from the mirror is wrong because, even in this case, a convex mirror will still provide a virtual, erect, and diminished picture of the thing. Option C) When the object is at a distance equal to the radius of the mirror is wrong because it doesn't alter how a convex mirror creates an image.