Скачать или смотреть Questions in Mirror formula

Questions in Mirror formula #numericals #mirror #optics #physics #shorts #viral
1️⃣ Mirrors in Optics
Mirrors are of two types:
(A) Concave Mirror (अवतल दर्पण)
Inner curved surface is the reflecting surface

Converging mirror
Forms real or virtual images

Used in: shaving mirror, headlight, reflector, solar furnac

(B) Convex Mirror (उत्तल दर्पण)
Outer curved surface reflects

Diverging mirror

Forms only virtual, erect & diminished image

Used in: rear-view mirror, security mirror

2️⃣ Mirror Formula

\frac{1}{f} = \frac{1}{v} + \frac{1}{u}

Where:

= focal length

= image distance

= object distance (always –ve)
Sign Convention (New Cartesian Sign Convention):

Object always placed left → negative
Real image on left → negative
Virtual image on right → positive
Concave mirror → negative
Convex mirror → positive

3️⃣ Magnification (विस्तारण)

Magnification tells how big or small the image is compared to the object.
Formula (mirror):
m = \frac{h_i}{h_o} = -\frac{v}{u}
✔ If m greater than 1 ---image magnified

✔ If m less than 1 --- image diminished small

✔ If m = 1 → same size image
✔ Sign meaning:
Positive m → image erect & virtual
Negative m → image inverted & real