Medium
The pictures show four ray diagrams of images formed by concave mirrors.
$P$ is the pole or centre of the reflecting surface of the mirror.
$F$ is the focus of the mirror.
$C$ is the centre of curvature of the mirror.
$AB$ is the object and $A'B'$ is the image of the object.
$1$. Which of these can be concluded from diagram $1$?
$A$. Image is formed at the focus.
$B$. Size of the image is equal to the size of the object.
$C$. Distance between pole and centre of curvature is twice the focal length.
$D$. Distance between the image and focus is half the distance between the object and focus.
$2$. Which diagram shows a real, inverted and enlarged image formed by the mirror?
$A$. Diagram $1$
$B$. Diagram $2$
$C$. Diagram $3$
$D$. Diagram $4$
$3$. In which condition does a concave mirror produce a virtual image?
$A$. When object is located within the focal length
$B$. When object is located at the centre of curvature
$C$. When object is located in between infinity and the centre of curvature
$D$. When object is located in between the centre of curvature and the focus
$4$. Solar cookers contain a concave mirror. How does the concave mirror help in heating the food? Write 'Yes' or 'No' for each statement.
How does the concave mirror heat the food? Yes/No Sun's rays are absorbed by the mirror. Yes/No Sun's rays reflected by the mirror converge at a point. Yes/No Sun's rays diverge out when reflected by the mirror. Yes/No
$P$ is the pole or centre of the reflecting surface of the mirror.
$F$ is the focus of the mirror.
$C$ is the centre of curvature of the mirror.
$AB$ is the object and $A'B'$ is the image of the object.
$1$. Which of these can be concluded from diagram $1$?
$A$. Image is formed at the focus.
$B$. Size of the image is equal to the size of the object.
$C$. Distance between pole and centre of curvature is twice the focal length.
$D$. Distance between the image and focus is half the distance between the object and focus.
$2$. Which diagram shows a real, inverted and enlarged image formed by the mirror?
$A$. Diagram $1$
$B$. Diagram $2$
$C$. Diagram $3$
$D$. Diagram $4$
$3$. In which condition does a concave mirror produce a virtual image?
$A$. When object is located within the focal length
$B$. When object is located at the centre of curvature
$C$. When object is located in between infinity and the centre of curvature
$D$. When object is located in between the centre of curvature and the focus
$4$. Solar cookers contain a concave mirror. How does the concave mirror help in heating the food? Write 'Yes' or 'No' for each statement.
| How does the concave mirror heat the food? | Yes/No |
| Sun's rays are absorbed by the mirror. | Yes/No |
| Sun's rays reflected by the mirror converge at a point. | Yes/No |
| Sun's rays diverge out when reflected by the mirror. | Yes/No |
(N/A) $1$. $C$. The distance between the pole $P$ and the centre of curvature $C$ is defined as the radius of curvature $R$, which is equal to $2f$, where $f$ is the focal length (distance $PF$).
$2$. $C$. Diagram $3$ shows the object placed between $C$ and $F$, resulting in a real, inverted, and enlarged image beyond $C$.
$3$. $A$. A concave mirror produces a virtual, erect, and enlarged image only when the object is placed between the pole $P$ and the focus $F$.
$4$.
- Sun's rays are absorbed by the mirror: No
- Sun's rays reflected by the mirror converge at a point: Yes
- Sun's rays diverge out when reflected by the mirror: No
$2$. $C$. Diagram $3$ shows the object placed between $C$ and $F$, resulting in a real, inverted, and enlarged image beyond $C$.
$3$. $A$. A concave mirror produces a virtual, erect, and enlarged image only when the object is placed between the pole $P$ and the focus $F$.
$4$.
- Sun's rays are absorbed by the mirror: No
- Sun's rays reflected by the mirror converge at a point: Yes
- Sun's rays diverge out when reflected by the mirror: No
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Similar Questions
Study the given ray diagrams and select the correct statement from the following:
$(A)$ Device $X$ is a concave mirror and device $Y$ is a convex lens, whose focal lengths are $20 \text{ cm}$ and $25 \text{ cm}$ respectively.
$(B)$ Device $X$ is a convex lens and device $Y$ is a concave mirror, whose focal lengths are $10 \text{ cm}$ and $25 \text{ cm}$ respectively.
$(C)$ Device $X$ is a concave lens and device $Y$ is a convex mirror, whose focal lengths are $20 \text{ cm}$ and $25 \text{ cm}$ respectively.
$(D)$ Device $X$ is a convex lens and device $Y$ is a concave mirror, whose focal lengths are $20 \text{ cm}$ and $25 \text{ cm}$ respectively.
$(A)$ Device $X$ is a concave mirror and device $Y$ is a convex lens, whose focal lengths are $20 \text{ cm}$ and $25 \text{ cm}$ respectively.
$(B)$ Device $X$ is a convex lens and device $Y$ is a concave mirror, whose focal lengths are $10 \text{ cm}$ and $25 \text{ cm}$ respectively.
$(C)$ Device $X$ is a concave lens and device $Y$ is a convex mirror, whose focal lengths are $20 \text{ cm}$ and $25 \text{ cm}$ respectively.
$(D)$ Device $X$ is a convex lens and device $Y$ is a concave mirror, whose focal lengths are $20 \text{ cm}$ and $25 \text{ cm}$ respectively.
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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.
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$(c)$ At twice the focal length of the lens.
$(d)$ At infinity.
$(e)$ At the focus of the lens.
Medium
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