There is a definite relationship between the image characteristics and the location where an object is placed in front of a concave mirror. Then the distance of the object from the mirror is, A. When an object is placed in front of a mirror, we see an image of the object placed. Use the intermediate image as the object for the mirror and work with the mirror alone to find the final image.) A mirror image is the result of light rays bounding off a reflective surface. The convex mirror is used as side-view mirror on the passenger’s side of a car because it forms an erect and smaller image for the way behind the car. The object distance, for any mirror is to be considered negative. B. The purpose of this lesson is to summarize these object-image relationships - to practice the L•O•S•T art of image description. The characteristics of an image formed by a flat mirror are: (a) The image and object are the same distance from the mirror, (b) The image is a virtual image, and (c) The image is situated behind the mirror. Correct option is . Unlike concave mirrors, convex mirrors always produce images that have these characteristics: (1) located behind the convex mirror (2) a virtual image (3) an upright image (4) reduced in size (i.e., smaller than the object) The location of the object does not affect the characteristics of the image. The size of the image is much smaller than compared to that of the object. The image produced by a convex mirror is always virtual, and located behind the mirror. As the object approaches the mirror the image also approaches the mirror and grows until its height equals that of the object. Free PDF Download of CBSE Class 10 Science Chapter 6 Life Process Multiple Choice Questions with Answers. The image formed in a convex mirror is always virtual and erect, whatever be the position of the object. MCQ Questions for Class 10 Science with Answers was Prepared Based on Latest Exam Pattern. When an object is located at infinity, a virtual image is created at the focus point. The image formed by convex mirror of focal length 30cm is the quarter of size of the object. As the object approaches the mirror the image also approaches the mirror and … MCQ Questions for Class 10 Science with Answers was Prepared Based on Latest Exam Pattern. The image formed by the convex mirror is always virtual and erect. C. 120cm. They are used whenever a mirror with a large field of view is needed. Example 2 - a convex mirror. To summarize, the image is real, inverted, 6.2 cm high, and 17.7 cm in front of the mirror. What is the radius of curvature of this Convex mirrors are used as rear-view mirrors in cars, to enable the driver to see the traffic behind him. A convex mirror is a type of spherical mirror in which the reflecting surface is the bulged out portion of the sphere. As such, the characteristics of the images formed by convex mirrors are easily predictable. There are, again, two alternative methods of locating the image formed by a convex mirror. Uses of the convex mirror. The image formed is as far behind the mirror as the object is in front of it. Where is the image in this case, and what are the image characteristics? A convex mirror is a type of spherical mirror in which the reflecting surface is the bulged out portion of the sphere. A different type of image is formed when an object, such as a person’s face, is held close to a convex lens. It can be seen that the image is formed by actual light rays and thus can form a visible image on a screen placed at the position of the image. On the contrary, the image formed by the concave lens is erect, virtual and smaller, than the object. According to the graphical method, the image produced by a convex mirror can always be located by drawing a ray diagram according to four simple rules: . The same Star Wars action figure, 8.0 cm tall, is placed 6.0 cm in front of a convex mirror with a focal length of -12.0 cm. A convex mirror or diverging mirror is a curved mirror in which the reflective surface bulges towards the light source. The focal length for a convex mirror, anyway is positive. Generally, a convex lens forms a real image, but it can also create a virtual image when the object is in the middle of the focus and optical centre. When the object is far away from the mirror the image is upright and located at the focal point. Find the location and magnification of a small bulb sitting 50 cm from the lens by using the algebraic method. The image formed in a convex mirror is always virtual and erect, whatever be the position of the object. Convex mirrors reflect light outwards, therefore they are not used to focus light. As such, the characteristics of the images formed by convex mirrors are easily predictable. Using a ray parallel to the principal axis and one incident upon the center of the mirror, the position of the image can be constructed by back-projecting the rays which reflect from the mirror. Convex mirrors are used as rear-view mirrors in cars, to enable the driver to see the traffic behind him. Bottom: The formation of a real image using a concave mirror. In this section, let us look at the types of images formed by a convex mirror. Students can solve NCERT Class 10 Science Life Process Multiple Choice Questions with Answers to know their preparation level. We wish to describe the characteristics of the image for any given object location. Convex mirrors reflect light outwards, therefore they are not used to focus light. A convex mirror forms a virtual image.The cartesian sign convention is used here. This is why they are useful. The reflective surface in convex mirror is on the bulge or outer side. In both diagrams, f is the focal point, O is the object, and I is the image. The first is graphical, and the second analytical. The reason is incorrect. D. 60cm. 90cm. When an object is placed at infinity, a virtual image is formed at the focus. The most common curved surface used in optical devices is a spherical mirror. Such mirrors always form a virtual image, since the focal point (F) and the centre of curvature (2F) are both imaginary points "inside" the mirror, that cannot be reached. In this section, let us look at the types of images formed by a convex mirror. In both diagrams, f is the focal point, O is the object, and I is the image. A case 1 image is formed when d o > f and f is positive, as in Figure 10a. What is the radius of curvature of this Whatever be the distance between the mirror and the object, the image formed by a convex mirror is always diminished, erect and virtual. The object is the source from which incident ray occurs and the image that is formed is because of the reflected rays. 90cm. There is a definite relationship between the image characteristics and the location where an object is placed in front of a concave mirror. There are, again, two alternative methods of locating the image formed by a convex mirror. The image formed by the convex mirror is always virtual and erect. How would the images be when the reflecting surfaces are curved? Convex mirrors reflect the light incident on them and therefore convex mirrors are also known as diverging mirrors. In this section, let us look at the types of images formed by a convex mirror. Bottom: The formation of a real image using a concave mirror. The size of the image is much smaller than compared to that of the object. Students can solve NCERT Class 10 Science Life Process Multiple Choice Questions with Answers to know their preparation level. The image formed in a convex mirror is always virtual and erect, whatever be the position of the object. It is observed that the size of a real image formed by a concave mirror is four times the size of the object when the object is 29.5 cm in front of the mirror. Example 2 - a convex mirror. So, lens equation will give: According to the graphical method, the image produced by a convex mirror can always be located by drawing a ray diagram according to four simple rules: . Generally, a convex lens forms a real image, but it can also create a virtual image when the object is in the middle of the focus and optical centre. When an object is located at infinity, a virtual image is created at the focus point. B. Such mirrors always form a virtual image, since the focal point (F) and the centre of curvature (2F) are both imaginary points "inside" the mirror, that cannot be reached. The image formed by a convex mirror is a virtual image, while concave mirror forms a real or virtual image, depending on the position of the object. On the contrary, concave mirrors are used in torches and vehicle headlights. The purpose of this lesson is to summarize these object-image relationships - to practice the L•O•S•T art of image description. 30cm. As the v is positive the image formed is virtual and erect. The assertion is correct as for any object position, the image formed by a convex mirror is virtual, erect, diminished and formed within focus behind the mirror. On the contrary, concave mirrors are used in torches and vehicle headlights. Where is the image in this case, and what are the image characteristics? To summarize, the image is real, inverted, 6.2 cm high, and 17.7 cm in front of the mirror. As a result, an image formed in a convex mirror is smaller than an image in a plane (flat) mirror. The image formed in a convex mirror is always virtual and erect, whatever be the position of the object. Class 10 Science MCQs […] A convex mirror or diverging mirror is a curved mirror in which the reflective surface bulges towards the light source. Unlike concave mirrors, convex mirrors always produce images that have these characteristics: (1) located behind the convex mirror (2) a virtual image (3) an upright image (4) reduced in size (i.e., smaller than the object) The location of the object does not affect the characteristics of the image. Further, the image is laterally inverted. Write four characteristics of the image formed by the mirror. The image produced by a convex mirror is always virtual, and located behind the mirror. The image formed maybe “Real” or “Virtual”. Free PDF Download of CBSE Class 10 Science Chapter 6 Life Process Multiple Choice Questions with Answers. Convex Mirror. The first is graphical, and the second analytical. On the contrary, the image formed by the concave lens is erect, virtual and smaller, than the object. The characteristics of an image formed by a flat mirror are: (a) The image and object are the same distance from the mirror, (b) The image is a virtual image, and (c) The image is situated behind the mirror. The same Star Wars action figure, 8.0 cm tall, is placed 6.0 cm in front of a convex mirror with a focal length of -12.0 cm. Answer. A concave mirror of radius of curvature 10 cm is placed 30 cm from a thin convex lens of focal length 15 cm. (A summary of the three cases or types of image formation appears at the end of this section.) We wish to describe the characteristics of the image for any given object location. An object is placed at a distance of 30 cm in front of a convex mirror of focal length 15 cm. The convex mirror is suitable for convenient shop and big supermarket and any other corner where need anti-thief , It is used in the turning off the road and parking . Using Mirror Formula: 1/v - 1/20 = 1/15 1/v = 1/15 + 1/20 1/v = 4 + 3 / 60 (Taking LCM of 15 and 20) 1/v = 7 / 60 Image distance is 8.57 cm behind the convex mirror. When the object is far away from the mirror the image is upright and located at the focal point. Solid blue lines indicate light rays. When an object is placed at infinity, a virtual image is formed at the focus. Because the image is smaller, more image can fit onto the mirror, so a convex mirror provides for a larger field of view than a plane mirror. Let ... Convex mirror ± 162 Science The reflecting surface of a spherical mirror forms a part of a sphere. In this section, let us look at the types of images formed by a convex mirror. Due to the thicker centre of convex lenses, the objects are seen larger and closer. The focal length of the convex mirror is f = 3 0 c m and the magnification of the image … It can be seen that the image is formed by actual light rays and thus can form a visible image on a screen placed at the position of the image. Due to the thicker centre of convex lenses, the objects are seen larger and closer. This image appears to be behind the mirror, and is called “Image”. The image formed by a convex mirror is a virtual image, while concave mirror forms a real or virtual image, depending on the position of the object. Solid blue lines indicate light rays. It is observed that the size of a real image formed by a concave mirror is four times the size of the object when the object is 29.5 cm in front of the mirror.
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