What is the effect of a dl-mixture on plane polarised light?

Explanation

To answer the question about the effect of a DL mixture on plane polarized light, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Understanding DL Mixture**:
- A DL mixture refers to a racemic mixture, which is a combination of equal amounts of two enantiomers: one isomer designated as "D" (dextrorotatory) and the other as "L" (levorotatory).

2. **Properties of Enantiomers**:
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