The hot objects which can transfer heat by radiation are :

Options

A. solids only
B. liquids and gases only
C. gases only
D. liquids, gases and solids

Answer

To answer the question "The hot objects which can transfer heat by radiation are:", we can follow these steps:

### Step 1: Understand Heat Transfer Mechanisms
Heat can be transferred through three main mechanisms: conduction, convection, and radiation. It is important to differentiate these methods to understand how hot objects can transfer heat.

### Step 2: Define Radiation
Radiation is the transfer of heat in the form of electromagnetic waves. This does not require a medium (solid, liquid, or gas) to transfer heat. For example, the heat from the sun reaches the Earth through radiation.

### Step 3: Identify Examples of Hot Objects
Hot objects can be in any state of matter: solid, liquid, or gas.

- **Solids**: A hot metal rod or a heated piece of iron can transfer heat by radiation. When heated, they emit infrared radiation which can be felt as warmth.

- **Liquids**: Hot water in a pan or a heated water filter can also transfer heat by radiation. Sitting near it allows you to feel the warmth radiating from the surface.

- **Gases**: Hot air, especially during summer, is another example. The heat from the sun warms the air around us, which is felt as warmth.

### Step 4: Conclusion
Since hot objects can be solids, liquids, or gases, we conclude that all three states of matter can transfer heat by radiation.

### Final Answer
The hot objects which can transfer heat by radiation are solids, liquids, and gases.

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