Fill in the following blanks with suitable words :
An image that cannot be obtained on a screen is called ________ image.

Answer

To solve the question, we need to identify the type of image that cannot be projected onto a screen. Let's break it down step by step:

1. **Understanding the Types of Images**:
- There are two main types of images formed by lenses and mirrors: real images and virtual images.
- Real images can be projected onto a screen, while virtual images cannot.

2. **Identifying the Correct Term**:
- Since the question specifically asks for an image that cannot be obtained on a screen, we need to focus on the type of image that fits this description.
- The type of image that cannot be projected onto a screen is known as a "virtual image."

3. **Filling in the Blank**:
- Based on our understanding, we can fill in the blank in the statement: "An image that cannot be obtained on a screen is called **virtual** image."

So, the complete statement is: "An image that cannot be obtained on a screen is called **virtual** image."