What is Magnification? Part 1 | Don't Memorise

TL;DR

The size of the image formed by spherical mirrors can be enlarged, the same size, or diminished depending on the object's distance from the mirror.

Transcript

There are various properties of images formed by spherical mirrors… the position, the size, and the nature of the image. These properties vary as the object’s distance from the mirror varies. The property that we are going to discuss in detail in this video is the SIZE of the image. For a concave mirror, there are three possibilities for the size o... Read More

Key Insights

• 🪩 The size of the image formed by spherical mirrors varies based on the object's distance from the mirror.
• 💁 Con cave mirrors can form enlarged, same-sized, or diminished images, while convex mirrors always form smaller images.
• 🥳 The magnification of an image is determined by the ratio of its size to the size of the object.
• 0️⃣ The size of the object and image cannot be zero in reality.
• 💭 There is a relation between magnification, object distance, and image distance, given by the equation 'hi/ho = -v/u'.
• 🥳 The ratio of the size of the image to the size of the object can be used to determine the nature of the image.
• 🪩 Understanding the size of images formed by spherical mirrors is crucial in solving problems related to mirror optics.

Questions & Answers

Q: What are the possibilities for the size of the image formed by a concave mirror?

The image can be enlarged, the same size, or diminished depending on the object's distance from the mirror.

Q: How is the size of the image formed by a convex mirror different from a concave mirror?

The size of the image formed by a convex mirror is always smaller, except when the object touches the mirror, in which case the image will be the same size as the object.

Q: What does the ratio of the size of the image to the size of the object represent?

The ratio of the size of the image to the size of the object represents the magnification of the image.

Q: Can the size of the object or image be zero?

In reality, the size of the object and image cannot be zero. While theoretically, the image formed when the object is at infinity is considered point-sized, in reality, it still has some dimensions.

Summary & Key Takeaways

• The size of the image formed by a concave mirror can be enlarged, the same size, or diminished depending on the object's distance from the mirror.

• The size of the image formed by a convex mirror is always smaller, except when the object touches the mirror.

• The ratio of the size of the image to the size of the object is called magnification.