Assertion an object is placed at a distance of f from a convex mirror of focal length f its image is formed at infinity
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The ASSERTION is false but the reason is true
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Assertion is true but reason is false.
What is a convex mirror?
A convex mirror is a curved spherical mirror also diverging mirror. The outer surface of the spherical acts as the reflecting surface.
Formation of image in convex mirror
- Convex mirrors form virtual images.
- When a ray of light parallel to principal axis is incident on the mirror, it reflects and passes through focus.
- When a ray of light passes through focus and is incident on the convex mirror, it reflects and gets parallel to the principal axis.
- So, image position of object at infinity is focus and image position of object at focus is infinity.
Your question has a missing part "reason". You might be referring to the following complete assertion and reason.
"Assertion: An object is placed at a distance of f from a convex mirror of focal length f its image is formed at infinity.
Reason: Convex mirror is a converging mirror"
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