When a body is heated, the colour which corresponds to highest temperature is

Options

A. red
B. yellow
C. white
D. orange

Explanation

To solve the question "When a body is heated, the color which corresponds to the highest temperature is," we can follow these steps:

### Step 1: Understand the relationship between temperature and color
When a body is heated, it emits radiation in the form of light. The color of this emitted light changes with temperature. This phenomenon is explained by Wien's Displacement Law.

**Hint:** Recall that different colors correspond to different wavelengths of light.

### Step 2: Recall Wien's Displacement Law
Wien's Displacement Law states that the wavelength of the peak emission of a black body is inversely proportional to its temperature. Mathematically, it can be expressed as:
\[ \lambda_{max} = \frac{b}{T} \]
where \( \lambda_{max} \) is the wavelength at which the emission is maximum, \( T \) is the absolute temperature, and \( b \) is Wien's displacement constant.

**Hint:** Higher temperatures correspond to shorter wavelengths.

### Step 3: Identify the colors and their corresponding wavelengths
The visible spectrum of light includes various colors, each with a specific wavelength. The order from longest to shortest wavelength is:
- Red (longest wavelength)
- Yellow
- Green
- Blue
- Violet (shortest wavelength)

**Hint:** Remember that red has the longest wavelength and violet has the shortest.

### Step 4: Determine which color corresponds to the highest temperature
Since Wien's Law tells us that as temperature increases, the peak wavelength decreases, the color that corresponds to the highest temperature will have the shortest wavelength. Among the options provided (red, yellow, white, and green), white light contains all colors and has a shorter wavelength compared to red, yellow, and green.

**Hint:** Consider that white light is a combination of all colors and has a higher energy than individual colors.

### Step 5: Conclusion
Based on the analysis, the color that corresponds to the highest temperature when a body is heated is **white**.

**Final Answer:** The color which corresponds to the highest temperature when a body is heated is **white**.