`………………….. ` emitted by `Co-60` can burn cancerous cells.

Answer

To answer the question, we need to identify the type of radiation emitted by Cobalt-60 that is used in cancer treatment. Here’s the step-by-step solution:

### Step 1: Identify the isotope
Cobalt-60 (Co-60) is a radioactive isotope of cobalt.

### Step 2: Understand the decay process
Cobalt-60 undergoes radioactive decay, transforming into a stable isotope of nickel (Ni-60).

### Step 3: Determine the emitted radiation
During the decay of Co-60, it emits high-energy radiation. Specifically, it emits gamma rays.

### Step 4: Application in cancer treatment
Gamma rays are known for their ability to penetrate tissues and are used in medical applications, particularly in the treatment of cancer. The high energy of gamma rays allows them to target and destroy cancerous cells effectively.

### Step 5: Identify the treatment method
One of the methods that utilize gamma rays from Co-60 is called the "gamma knife," which is a precise form of radiation therapy.

### Final Answer
Thus, the complete answer to the question is: **Gamma rays emitted by Co-60 can burn cancerous cells.**

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