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## Class 10 Physics (India)

### Course: Class 10 Physics (India)>Unit 1

Lesson 6: Mirror formula derivation (Bonus)

# Mirror formula derivation

In this video, we will derive the mirror formula (expression connecting u,v, and f) and magnification formula. We will use a concave mirror to do it. Created by Mahesh Shenoy.

## Want to join the conversation?

• If we are supossing sperical mirror to be a plane mirror the why not is showing the properties of plane mirror
(1 vote)
• we are taking a small portion of the spherical mirror and saying that , the small portion exhibits properties of a plane mirror. We aren't saying they are the exact same
• *"At , why do we divide the equation formed only by uvf?"*
• Since the object is moved 2cm, the image will also move 2cm
Hence, 2cm is the difference
(1 vote)
• An object is placed 20cm infront of a plane mirror. The mirror is moved 2 cm towards the object. The distance between the position of original and final image seen in the mirror
(1 vote)
• Hey Keshab!
Since the object is moved 2cm, the image will also move 2cm
Hence, 2cm is the difference
Hope it helps. Feel free to comment if your doubt persists...Have fun learning :)
• at What are similar triangles?