Which of the following is used for obtaining spectrum?

Correct option is C

(c) Prism

A prism is used to split light into its component colors (spectrum). When white light passes through a prism, the different wavelengths of light are refracted by different amounts, creating a visible spectrum.

• Convex lens and concave mirror are used for focusing light but don't separate light into a spectrum.
• Concave lens diverges light and cannot be used to create a spectrum.

Information Booster:

1. A prism works based on the principle of dispersion, which occurs due to the variation in the refractive index for different wavelengths of light.
2. Spectrophotometers and spectrometers often use prisms or diffraction gratings to analyze the spectrum of light.
3. The visible spectrum of light consists of colors from red to violet.

Additional Information:

• A diffraction grating can also be used to split light into its spectrum, often preferred in high-resolution spectroscopy because it provides more precise measurements than a prism.
• Light pollution can affect the visibility of natural spectra, especially in urban areas.