Physics
The image formed by a concave mirror is of the same size as the object, if the object is placed:
- at the focus
- between the pole and the focus
- between the focus and the centre of curvature
- at the centre of curvature
Reflection of Light
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Answer
at the centre of curvature
Reason — If the object is placed at the centre of curvature of concave mirror the image formed is real, inverted and of the same size as that of object.
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Related Questions
If the radius of curvature of a concave mirror is 20 cm, its focal length is:
- 10 cm
- 20 cm
- 40 cm
- 80 cm
The image formed by a convex mirror is:
- erect and diminished
- erect and enlarged
- inverted and diminished
- inverted and enlarged
A convex mirror is used:
- as a shaving mirror
- as a head mirror by a dentist
- as a rear view mirror by a driver
- as a reflector in torch
Assertion (A) : If a white light is passed through a prism, it splits into different colours.
Reason (R) : White light is a mixture of colours.
- Both A and R are true and R is the correct explanation of A
- Both A and R are true and R is not the correct explanation of A
- Assertion is true but reason is false
- Assertion is false but reason is true