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Sign Convention for Reflection by Spherical Mirrors Video Lecture | Science Class 10

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FAQs on Sign Convention for Reflection by Spherical Mirrors Video Lecture - Science Class 10

1. What is the sign convention for reflection by spherical mirrors?
Ans. The sign convention for reflection by spherical mirrors follows the Cartesian coordinate system. The principal axis of the mirror is taken as the x-axis, with the origin at the center of curvature. The object is placed on the positive side of the x-axis, while the image formed is on the negative side. Distances measured parallel to the principal axis are taken as positive, while distances measured perpendicular to the principal axis are taken as negative.
2. How is the sign convention applied for object distance and image distance in spherical mirrors?
Ans. For object distance, the distance from the object to the mirror is taken as positive if it lies on the same side as the object and negative if it lies on the opposite side. For image distance, the distance from the image to the mirror is taken as positive if it lies on the opposite side of the object and negative if it lies on the same side.
3. What is the sign convention for focal length in spherical mirrors?
Ans. The sign convention for focal length in spherical mirrors is as follows: If the reflecting surface is convex, the focal length is positive. If the reflecting surface is concave, the focal length is negative. The focal length is the distance from the mirror to the principal focus along the principal axis.
4. How is magnification sign convention applied in spherical mirrors?
Ans. The sign convention for magnification in spherical mirrors is as follows: If the magnification is positive, the image formed is upright and virtual. If the magnification is negative, the image formed is inverted and real. Magnification is calculated as the ratio of the height of the image to the height of the object.
5. What happens to the sign conventions when dealing with multiple mirrors in an optical system?
Ans. When dealing with multiple mirrors in an optical system, the sign conventions for object distance, image distance, focal length, and magnification remain the same as for single mirrors. Each mirror is treated individually according to the sign convention, and the overall system can be analyzed using the principles of mirror reflection.
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