Name the colour of white light which is deviated (i) the most, and (ii) the least, on passing through a prism.

Answer

To solve the question regarding the colors of white light that are deviated the most and the least when passing through a prism, we can follow these steps:

### Step 1: Understand the Concept of Deviation
When white light passes through a prism, it gets separated into its constituent colors due to refraction. The degree of deviation depends on the wavelength of the light.

### Step 2: Relate Deviation to Wavelength
The deviation of light is inversely proportional to its wavelength. This means that shorter wavelengths will deviate more, while longer wavelengths will deviate less.

### Step 3: Identify the Colors of White Light
White light consists of seven colors: Red, Orange, Yellow, Green, Blue, Indigo, and Violet. These colors can be remembered using the acronym ROYGBIV.

### Step 4: Determine the Wavelengths of the Colors
Among the colors of white light:
- Violet has the shortest wavelength.
- Red has the longest wavelength.

### Step 5: Conclude the Deviated Colors
Since violet has the shortest wavelength, it will be deviated the most when passing through a prism. Conversely, red, having the longest wavelength, will be deviated the least.

### Final Answer
(i) The color of white light that is deviated the most is **Violet**.
(ii) The color of white light that is deviated the least is **Red**.

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