The minimum distance of clear vision for a healthy eye is 25 cm. This is known as the near point of the eye, where objects can be seen clearly without strain. It allows the eye to focus on close objects ...
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If a person cannot see distant objects clearly, the defect in vision is near sightedness. Near sightedness, or myopia, occurs when light entering the eye is focused in front of the retina instead of directly on it, causing distant objects ...
A person suffering from nearsightedness (myopia) can see nearby objects clearly but has difficulty seeing distant objects. Myopia occurs when light entering the eye is focused in front of the retina, causing distant objects to appear blurred. This condition can ...
The color of an opaque object is due to the color which it absorbs. When light strikes an opaque object, certain wavelengths (colors) of light are absorbed by the object’s surface material. The remaining wavelengths are reflected or scattered, giving ...
If a green electric bulb is installed in a room, the red cloth will appear black colored. This is because green light is absorbed by the red cloth, which reflects only red wavelengths. Since green light is absent, the cloth ...
The additional yellow lights on some transport vehicles are used to improve visibility in foggy or hazy conditions. This is because yellow light has a longer wavelength than white light, allowing it to better penetrate through the water droplets in ...
Light can be separated into its constituent colors using a prism. When white light passes through a prism, it undergoes dispersion, where different wavelengths (colors) of light bend by different amounts, creating a spectrum of colors from red to violet.
When red glass is heated at high temperature, it will appear green. This phenomenon occurs due to changes in the glass’s structure at high temperatures, altering its light absorption properties and causing it to transmit green light instead of red.
The color of light is determined by its wavelength. Wavelength corresponds to the distance between successive peaks or troughs of a wave and determines the color perceived by the human eye. Different wavelengths of light correspond to different colors in ...
In a rainbow, purple is dispersed more. The dispersion of light occurs due to the varying wavelengths of different colors, with shorter wavelengths like purple bending more than longer wavelengths like red. This results in purple being more spread out ...