Which of the following metal on used in flash bulbs?

Options

A. Be
B. Mg
C. Ca
D. Ba

Answer

To determine which metal is used in flash bulbs, we can follow these steps:

### Step 1: Understand the Function of Flash Bulbs
Flash bulbs are devices that produce a bright flash of light, typically used in photography to illuminate a scene in low-light conditions.

**Hint:** Consider the purpose of flash bulbs and the type of light they emit.

### Step 2: Identify Common Metals Used in Flash Bulbs
Research the metals commonly used in flash bulbs. The key characteristic of these metals is that they should produce a bright flash when ignited.

**Hint:** Think about metals that burn brightly or produce a significant amount of light when they react with oxygen.

### Step 3: Analyze the Properties of Magnesium
Magnesium is known for its ability to burn with a dazzling white flame. When magnesium reacts with oxygen in the air, it forms magnesium oxide and releases a significant amount of energy in the form of light.

**Hint:** Look for information on the combustion of magnesium and its products.

### Step 4: Compare with Other Metals
Consider other metals mentioned in the options (like beryllium) and evaluate their properties. Beryllium does not produce a bright flash like magnesium when burned.

**Hint:** Compare the burning characteristics of magnesium with those of other metals.

### Step 5: Conclusion
Based on the analysis, the metal used in flash bulbs is magnesium, as it produces a bright white light when ignited.

**Final Answer:** Magnesium is the metal used in flash bulbs.