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Dispersion by a Prism Video Lecture | Physics Class 12 - NEET

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FAQs on Dispersion by a Prism Video Lecture - Physics Class 12 - NEET

1. What is dispersion by a prism?
Dispersion by a prism refers to the phenomenon where a prism splits white light into its component colors. This happens because different colors of light have different wavelengths and hence different refractive indices, causing them to bend at different angles as they pass through the prism.
2. How does a prism cause dispersion?
A prism causes dispersion by refracting, or bending, different colors of light by different amounts. This occurs because the refractive index of a medium, such as a prism, varies with the wavelength of light. As white light passes through a prism, each color component experiences a different angle of refraction, resulting in the separation of colors.
3. What is the purpose of using a prism to disperse light?
The purpose of using a prism to disperse light is to separate white light into its component colors, creating a spectrum. This phenomenon is useful in various applications, such as spectroscopy, where scientists can analyze the composition of a substance based on the specific wavelengths of light it absorbs or emits.
4. How can dispersion by a prism be used in photography?
Dispersion by a prism can be used creatively in photography to create unique and artistic effects. By placing a prism in front of the camera lens, photographers can introduce colorful light flares or create a distorted, dream-like appearance in their images. It adds a touch of creativity and can enhance the overall visual impact of a photograph.
5. Are all prisms equally effective in causing dispersion?
No, all prisms are not equally effective in causing dispersion. The amount of dispersion depends on the material and the geometry of the prism. Different types of prisms, such as equilateral, right-angle, or diffraction gratings, have varying degrees of dispersion. Additionally, the refractive index of the prism material also plays a significant role in determining the extent of dispersion.
158 videos|453 docs|185 tests

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