**Core Concept**
Burnishing is a technique used to compact and shape dental amalgam restorations, ensuring a tight seal between the amalgam and the tooth structure. This process involves using a burnisher to apply pressure and remove excess amalgam, creating a smooth surface.

**Why the Correct Answer is Right**
Burnishing does not involve the application of heat, as it is a cold-condensing process. The burnisher is used to apply pressure to the amalgam, causing it to flow and fill the interproximal areas. This process relies on the mechanical properties of the amalgam, such as its flow and compressibility, to achieve a tight seal.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not relevant to the process of burnishing.
* **Option B:** Burnishing does not involve the use of heat, so this option is incorrect.
* **Option C:** This option is not related to the process of burnishing.
* **Option D:** This option is incorrect because burnishing does not involve the use of light.

**Clinical Pearl / High-Yield Fact**
To achieve a successful burnished amalgam restoration, it is essential to use the correct technique, including the proper application of pressure and the use of a burnisher with a smooth surface.

**Correct Answer:** B. Burnishing does not involve the application of heat.