A magnetic field is an invisible force field around a magnet where magnetic forces are exerted. It is represented by field lines that emerge from the north pole and enter the south pole of the magnet.
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Magnets attract or repel each other based on their poles. Opposite poles (north and south) attract, while like poles (north-north or south-south) repel. This behavior is due to the interaction of their magnetic fields.
Magnets are classified into three main types: permanent magnets, temporary magnets, and electromagnets. Permanent magnets retain their magnetism, temporary magnets lose it quickly, and electromagnets are magnetic only when an electric current flows.
A telescope is used to observe distant objects. It gathers and magnifies light from far-away celestial bodies such as stars, planets, and galaxies, enabling astronomers and enthusiasts to study them in detail.
In biology laboratories, compound microscopes are used to see magnified images of microscopic cells or organisms. These microscopes use multiple lenses to magnify tiny objects, allowing scientists to observe details not visible to the naked eye and study biological structures ...
A watchmaker uses a magnifying lens to see the fine parts of a watch. This tool helps magnify small details, making it easier to inspect and work on intricate components such as gears, springs, and tiny screws with precision.
A telescope is an optical instrument used to observe distant objects by collecting and focusing light. It consists of lenses or mirrors that magnify distant images, making them appear closer and more detailed. Telescopes are essential tools in astronomy for ...
Lumen is the unit of luminous flux, which measures the total amount of visible light emitted by a light source per unit of time. It quantifies the brightness of light as perceived by the human eye, regardless of the direction ...
A person suffering from a distance of less than 1 meter is suffering from nearsightedness. Nearsightedness, or myopia, is a vision condition where close objects are seen clearly, but distant objects appear blurry. This occurs because the eye focuses light ...
A person unable to see an object more than 10 meters away is suffering from myopia. Myopia, or nearsightedness, causes distant objects to appear blurry while close objects are clear. This occurs because the eye focuses light in front of ...