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Question
The radius of curvature of a concave mirror whose focal length is 5cm is ______
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Solution
The radius of curvature of a concave mirror whose focal length is 5cm is 10 cm
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RELATED QUESTIONS
A student has obtained the image of a distant object with a concave mirror to determine its focal length. If he has selected a well-illuminated red building as object, which of the following correctly describes the features of the image formed?
(A) Virtual, inverted and diminished image in red shade
(B) Real, erect and diminished image in pink shade
(C) Real, inverted and diminished image in red shade
(D) Virtual, erect and enlarged image in red shade
Fill in the following blank with suitable word:
The focal length of a concave mirror is the distance from the ......... to the mirror.
If an object is placed at the focus of a concave mirror, where is the image formed?
Briefly describe how you would find the focal length of a concave mirror quickly but approximately
The real image formed by a concave mirror is larger than the object when object is:
(a) at a distance equal to radius of curvature
(b) at a distance less than the focal length
(c) between focus and centre of curvature
(d) at a distance greater than radius of curvature
Giving reasons, state the 'signs' (positive or negative) which can be given to the following:
(a) object distance (u) for a concave mirror or convex mirror
(b) image distance (v) for a concave mirror
(c) image distance (v) for a convex mirror
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The diagram shows a dish antenna which is used to receive television signals from a satellite. The antenna (signal detector) is fixed in front of the curved dish.
- What is the purpose of the dish?
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- Where should the antenna be positioned to receive the strongest possible signals?
- Explain what change you would expect in the signals if a larger dish was used.
The mirror having reflection surface curved outward ______.
A concave mirror of radius 30 cm is placed in water. It’s focal length in air and water differ by ______.
