Define image (in physics) .
Answers
Answer:
An image may be defined as that point, where the light rays coming from an object meet or appears to meet after reflection or refraction.
Explanation:
In this definition the word ‘object’ may be defined as anything which gives out light rays. The objects can be of two types: (1) very small objects and (2) large objects or extended objects. The small objects are represented by a dot in a ray diagram, while the large objects can be represented by an arrow pointing in upward direction.
Types of Images
The images are of two types:
1. Real images
2. Virtual images
Real Images
A real image is that image which is formed when the light rays coming from an object actually meet each other after reflection or refraction. A real image can be obtained on the screen. The real image is always inverted. The common example of real image is the image formed on the cinema screen.
Virtual Image
A virtual image is that image which is formed when the light rays coming from an object do not actually meet, but appear to meet when produced backwards. These images cannot be obtained on the screen. The virtual image is always erect. The common example of virtual image is the image formed in the mirror when we stand in front of that mirror.
Differences between Real Images and Virtual Images
1. A real image is that image which is formed when the light rays coming from an object actually meet each other after reflection or refraction. A virtual image is that image which is formed when the light rays coming from an object do not actually meet, but appear to meet when produced backwards.
2. A real image can be obtained on the screen. These images cannot be obtained on the screen.
3. The real image is always inverted. The virtual image is always erect.
4. The common example of real image is the image formed on the cinema screen. The common example of virtual image is the image formed in the mirror when we stand in front of that mirror.
1.The general impression.made by a person
2.The visual structure that give information about particular thing.