A handheld spectroscope is primarily used to analyze the spectral composition or color of light rather than its intensity. It allows you to observe the distribution of different wavelengths or colors present in a light source.
Typically, a handheld spectroscope consists of a narrow slit or a small entrance aperture that lets light enter. The light then passes through a diffraction grating, which disperses the light into its component wavelengths. The dispersed light is observed through an eyepiece or a detector, such as a camera or a smartphone.
To analyze the intensity of light using a handheld spectroscope, you would need additional equipment, such as a photodetector or a light sensor. By placing the photodetector or light sensor at the output of the spectroscope, you can measure the intensity of the different wavelengths of light. This allows you to create an intensity profile or a graph showing the variation of light intensity with respect to the wavelength.
To measure the color or analyze the diffraction spectrum produced by the handheld spectroscope, you observe the pattern of colored lines or bands resulting from the dispersion of light by the diffraction grating. Each line or band corresponds to a specific wavelength or color.
To interpret the diffraction spectrum, you can compare it with known spectral lines or patterns associated with different light sources or elements. For example, you might compare it to a reference spectrum or consult a database of known emission or absorption lines. This can help you identify the elements or molecules present in the light source and provide insights into its composition.
Keep in mind that the handheld spectroscope is a qualitative tool primarily used for visual observation and basic analysis of spectral colors. For precise quantitative measurements of light intensity and accurate spectral analysis, more advanced spectrometers with calibrated detectors and software are typically employed.