An object is placed 15cm in front of a plane mirror. If the mirror is moved further 5cm away from the object and the image is
80cm
40cm
50cm
70cm
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An object is placed 15cm in front of a plane mirror. If the mirror is moved further 5cm away from the object, here is the right question,Hw far is the image from the object
then the answer will be (15+5)*2=40
An object is placed 15cm in front of a plane mirror. If the mirror is moved further 5cm away from the object, here is the right question,Hw far is the image from the object
It seams the question my school gave has a little mistake. Never mind here's the correct question:
An object is placed 15cm in front of a plane mirror. If the mirror is moved further 5cm away from the object,the distance between the object and the image is :
The correct answer is B: 40cm. Here's how to solve the problem:
Initial situation:
The object is 15 cm in front of the mirror, so the image is also 15 cm behind the mirror. The total distance between the object and the image is 15 cm + 15 cm = 30 cm.
Mirror moved:
The mirror is moved 5 cm further away, so the object is now 15 cm + 5 cm = 20 cm in front of the mirror.
New image distance:
The image is now 20 cm behind the mirror.
(This is because object distance is equal to the image distance).
Total distance:
The total distance between the object and the image is 20 cm + 20 cm = 40 cm.
In the case of a plane mirror, the image formed is always virtual, upright, and located at the same distance behind the mirror as the object is in front of it.
Let's break it down:
1. **Initial Position:**
- The object is 15 cm in front of the mirror.
- The image will be formed at 15 cm behind the mirror.
2. **When the mirror is moved 5 cm away from the object:**
- Now, the object is 15 cm + 5 cm = 20 cm away from the mirror.
- The image will form at the same distance (20 cm) behind the mirror.
So, the image's distance from the new position of the mirror is 20 cm.
The correct answer is **B: 40 cm** (since it's the total distance, with 20 cm from the object and 20 cm from the image to the new position of the mirror).
A plane mirror forms a virtual image that is the same distance behind the mirror as the object is in front of it. This means that the image distance is equal to the object distance, but negative to indicate that the image is behind the mirror.
When the mirror is moved further away from the object by 5 cm, the object distance from the mirror becomes 15+5=20 cm. Since the image distance is equal to the object distance (but negative), the image distance is −20 cm.
Therefore, the image distance is = −20 cm when the mirror is moved further 5 cm away from the object.
15cm in front of a mirror
10cm if d mirror is moved further 5cm away from d object
dxtnc btw d object n d mirror 10cm+10cm=20cm
20*2=40cm
my own slvin tho
