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What is the difference between virtual image formed by a convex lens and that formed by a concave lens?
A convex lens forms a virtual image only when the object is within its focal length. The image is upright, magnified, and on the same side as the object. A concave lens always forms a virtual image, which is upright, diminished, and on the same side. For more visit here: https://www.tiwariacademy.coRead more
A convex lens forms a virtual image only when the object is within its focal length. The image is upright, magnified, and on the same side as the object. A concave lens always forms a virtual image, which is upright, diminished, and on the same side.
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A convex lens is placed in contact with a plane mirror. A point object at a distance of 20 cm on the axis of this combination has its image coinciding with itself. What is the focal length of the lens?
The image coincides with the object, indicating that the object is at the focal point of the convex lens. Thus, the focal length of the lens is 20 cm, as the object distance equals the focal length. For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-9/
The image coincides with the object, indicating that the object is at the focal point of the convex lens. Thus, the focal length of the lens is 20 cm, as the object distance equals the focal length.
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Define the term angular momentum. Give its units and dimensions.
Angular momentum is a fundamental concept in physics. It quantifies the rotational motion of an object about a particular axis. In short, it represents how much an object possesses in terms of its rotational motion and how hard it is to change that motion. Angular momentum is derived from two key faRead more
Angular momentum is a fundamental concept in physics. It quantifies the rotational motion of an object about a particular axis. In short, it represents how much an object possesses in terms of its rotational motion and how hard it is to change that motion. Angular momentum is derived from two key factors: the moment of inertia, which represents the mass distribution relative to the axis of rotation, and angular velocity, which indicates how fast it is rotating.
The significance of angular momentum extends beyond its definition; it is governed by the principle of conservation. In a closed system with no external torques acting on it, the total angular momentum remains constant. This principle is vital in analyzing the behavior of rotating systems, such as planets in orbit, spinning tops, and particles in quantum mechanics.
The unit for angular momentum in the International System of Units is kilogram meter squared per second. This is an effective representation of the mass of the rotating object, the distance from the axis of rotation, and the time involved in the motion. The dimensions of angular momentum can be expressed in terms of mass, length, and time, reflecting its dependence on these fundamental physical quantities. Understanding angular momentum is essential for studying and predicting rotational dynamics in various physical systems.
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See lessA converging lens is kept coaxially in contact with diverging lens – both the lenses being of equal focal lengths. What is the focal length of the combination?
For a converging lens (f1 >0) and a diverging lens (f2 <0) with equal focal lengths (∣f1 ∣= ∣f2∣): 1/f = 1/f1 + 1/f2 = 1/f - 1/f = 0 Thus, the combination has infinite focal length and behaves like a plane glass. For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-12/physiRead more
For a converging lens (f1 >0) and a diverging lens (f2 <0) with equal focal lengths (∣f1 ∣= ∣f2∣):
1/f = 1/f1 + 1/f2 = 1/f – 1/f = 0
Thus, the combination has infinite focal length and behaves like a plane glass.
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What is the relative error in measurement?
Relative error = Absolute Error/True Value. For more please visit here: https://www.tiwariacademy.com/ncert-solutions/class-11/physics/chapter-1/
Relative error = Absolute Error/True Value.
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