an object is placed at a distance of 20 cm in front of convexmirror of radius oc curvature 30 cm find the position and nature of the image
Answers
Question ⚠️ An object is placed at a distance of 20 cm in front of the convex mirror of radius of curvature 30 cm . Find the position and nature of the image ✔️
Answer
⚠️ In case of convex mirror we will take negative sign in case of U
So
⭕️ U = -20cm
⭕️ Radius of curvature
r = 30cm
f = R/2
= 30/2 = 15 cm
By the mirror formula
1/f=1/u+1/V
⭕️ 1/V =1/f -1/u
⭕️ 1/15 -1/(-20)
⭕️ 1/15 + 1/20
Cross multiplying
⭕️ 20 + 15
_______________
20 x 15
⭕️ 35
_______
300
Divide by taking its reciprocal
⚠️ 300/35
⭕️ 60/7 ,....there for V = 60/7
By using the mirror formula and substiting the above values you will get your answer as ⚠️ V = 60/7
➡️ The image formed at a distance 60/7 cm is behind the mirror
⭕️ Nature of the image will be virtual and erect
Hope you understand
Answer:
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