$A$ concave mirror is placed on a horizontal table,with its axis directed vertically upwards. Let $O$ be the pole of the mirror and $C$ its centre of curvature. $A$ point object is placed at $C$. It has a real image,also located at $C$ (a condition called auto-collimation). If the mirror is now filled with water,the image will be:
- Areal,and will remain at $C$
- Breal,and located at a point between $C$ and $\infty$
- Cvirtual,and located at a point between $C$ and $O$
- Dreal,and located at a point between $C$ and $O$
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Similar Questions
$A$ $60 \text{ W}$ bulb is hung over the center of a table of size $4 \text{ m} \times 4 \text{ m}$ at a height of $3 \text{ m}$. The ratio of the intensities of illumination at a point on the center of the edge $(A)$ and at the corner of the table $(B)$ is:
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View Solution$A$ prism with a refractive index of $1.5$ and an angle $A = 4^o$ is placed in front of a mirror. When the incident ray is reflected by the mirror,what is the total deviation in degrees?
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View Solution$A$ point object is kept at the first focus of a convex lens. If the lens starts moving towards the right with a constant velocity, the image will
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View SolutionTo find the focal length of a convex mirror,a student records the following data:
Object Pin Convex Lens Convex Mirror Image Pin $22.2 \, cm$ $32.2 \, cm$ $45.8 \, cm$ $71.2 \, cm$
The focal length of the convex lens is $f_1$ and that of the mirror is $f_2$. Taking index correction to be negligibly small,$f_1$ and $f_2$ are close to:
| Object Pin | Convex Lens | Convex Mirror | Image Pin |
|---|---|---|---|
| $22.2 \, cm$ | $32.2 \, cm$ | $45.8 \, cm$ | $71.2 \, cm$ |
The focal length of the convex lens is $f_1$ and that of the mirror is $f_2$. Taking index correction to be negligibly small,$f_1$ and $f_2$ are close to:
DifficultJEE MAIN 2016
View SolutionAn optical component and an object $S$ placed along its optic axis are given in Column $I$. The distance between the object and the component can be varied. The properties of images are given in Column $II$. Match all the properties of images from Column $II$ with the appropriate components given in Column $I$.
Column $I$ Column $II$ $A$. Concave Mirror $(p)$ Real image $B$. Convex Mirror $(q)$ Virtual image $C$. Convex Lens $(r)$ Magnified image $D$. Concave Lens $(s)$ Image at infinity
| Column $I$ | Column $II$ |
| $A$. Concave Mirror | $(p)$ Real image |
| $B$. Convex Mirror | $(q)$ Virtual image |
| $C$. Convex Lens | $(r)$ Magnified image |
| $D$. Concave Lens | $(s)$ Image at infinity |
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