Medium
Under which of the following conditions can a concave mirror form an image larger than the actual object?
- AWhen the object is kept at a distance equal to its radius of curvature
- BWhen the object is kept at a distance less than its focal length
- CWhen the object is placed between the focus and the centre of curvature
- DWhen the object is kept at a distance greater than its radius of curvature
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Similar Questions
The following table gives the values of refractive indices of a few media:
$S.No.$ $1$ $2$ $3$ $4$ $5$ Medium Water Crown glass Rock salt Ruby Diamond Refractive index $1.33$ $1.52$ $1.54$ $1.71$ $2.42$
Use this table to give an example of $(i)$ a medium pair so that light speeds up when it goes from one of these media to another. $(ii)$ a medium pair so that light slows down when it goes from one of these media to another.
| $S.No.$ | $1$ | $2$ | $3$ | $4$ | $5$ |
| Medium | Water | Crown glass | Rock salt | Ruby | Diamond |
| Refractive index | $1.33$ | $1.52$ | $1.54$ | $1.71$ | $2.42$ |
Use this table to give an example of $(i)$ a medium pair so that light speeds up when it goes from one of these media to another. $(ii)$ a medium pair so that light slows down when it goes from one of these media to another.
Medium
View SolutionDraw ray diagrams showing the image formation by a convex lens when an object is placed:
$(a)$ Between optical centre and focus of the lens.
$(b)$ Between focus and twice the focal length of the lens.
$(c)$ At twice the focal length of the lens.
$(d)$ At infinity.
$(e)$ At the focus of the lens.
$(a)$ Between optical centre and focus of the lens.
$(b)$ Between focus and twice the focal length of the lens.
$(c)$ At twice the focal length of the lens.
$(d)$ At infinity.
$(e)$ At the focus of the lens.
Medium
View SolutionIf the focal length of a spherical mirror is $20 \ cm$,what is its radius of curvature (in $cm$)?
Easy
View SolutionWhich of the following statements is true about the image formed by a plane mirror?
Easy
View SolutionDefine the following terms:
$(i)$ Angle of incidence
$(ii)$ Angle of reflection
$(iii)$ Plane of incidence
$(i)$ Angle of incidence
$(ii)$ Angle of reflection
$(iii)$ Plane of incidence
Easy
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