Final answer:
Metallic salts are used in fireworks to produce different colors when they are heated. Different metals produce different colors based on their unique emission spectra. Overall, metallic salts play a crucial role in creating the vibrant visual effects of fireworks.
Step-by-step explanation:
Metallic salts are used in fireworks to produce different colors. When the salts are heated, they release energy in the form of light, creating colorful displays.
For example, strontium is commonly used to create red fireworks, while barium produces a green color. Different metals are chosen based on their unique emission spectra, which determine the color they produce when heated.
Overall, metallic salts play a crucial role in creating the vibrant and dazzling visual effects we see in fireworks.