Solutions of Reflection of Light (Page No- 205) - Physics By Lakhmir Singh, Class 10 Class 10 Notes | EduRev

Class 10 Physics Solutions By Lakhmir Singh & Manjit Kaur

Class 10 : Solutions of Reflection of Light (Page No- 205) - Physics By Lakhmir Singh, Class 10 Class 10 Notes | EduRev

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Lakhmir Singh Physics Class 10 Solutions Page No:205

Question 1: What type of image/images are formed by :
 (a) a convex mirror ?
 (b) a concave mirror ?

Solution : (a) Virtual and erect
(b) Virtual and erect; real and inverted

Question 2: Which mirror has a wider field of view ?

Solution : Convex mirror has a wider field of view.

Question 3: If you want to see an enlarged image of your face, state whether you will use a concave mirror or a convex mirror ?

Solution : Concave mirror.

Question 4: Which mirror always produces a virtual, erect and diminished image of an object ? 

Solution : Convex mirror always produces a virtual, erect and diminished image.

Question 5: An object is placed at a long distance in front of a convex mirror of radius of curvature 30 cm. State the position of its image.

Solution : Image is formed at the focus.
focus = 30/2 = 15 cm
i.e. 15 cm behind the convex mirror.

Question 6: Name the spherical mirror which can produce a real and diminished image of an object.

Solution : Concave mirror.

Question 7: Name the spherical mirror which can produce a virtual and diminished image of an object.

Solution : Convex mirror.

Question 8: One wants to see a magnified image of an object in a mirror. What type of mirror should one use ?

Solution : Concave mirror should be used to get a magnified image.

Question 9: Name the mirror which can give :
 (a) an erect and enlarged image of an object.
 (b) an erect and diminished image of an object.

Solution : (a) Concave mirror.
(b) Convex mirror.

Question 10: State whether the following statement is true or false :

A diverging mirror is used as a rear-view mirror.

Solution : True.

Question 11: What type of mirror could be used :
 (a) as a shaving mirror ?
 (b) as a shop security mirror ? 

Solution : (a) Concave mirror.
(b) Convex mirror.

Question 12: Which type of mirror is usually used as a rear-view mirror in motor cars ?

Solution : Convex mirror.

Question 13: What kind of mirrors are used in big shopping centres to watch the activities of the customers ?

Solution :Convex mirrors.

Question 14: A ray of light going towards the focus of a convex mirror becomes parallel to the principal axis after reflection from the mirror. Draw a labelled diagram to represent this situation.

Solution : diagram 47.

Question 15: Fill in the following blank with a suitable word :

A ray of light which is parallel to the principal axis of a convex mirror, appears to be coming from…….. after
 reflection from the mirror. 

Solution : focus.

Question 16: Why does a driver prefer to use a convex mirror as a rear-view mirror in a vehicle ?

Solution : A driver prefers to use a convex mirror as a rear-view mirror because
(i) A convex mirror always produces an erect image of the objects.
(ii) A convex mirror has wider field of view.

Question 17: Why can you not use a concave mirror as a rear-view mirror in vehicles ?

Solution : We cannot use a concave mirror as a rear-view mirror in vehicles because a concave mirror produces inverted images of distant objects. So, all the vehicles will be seen running upside down in the mirror.

Question 18: Where would the image be formed by a convex mirror if the object is placed :
 (a) between infinity and pole of the mirror ?
 (b) at infinity ?
 Draw labelled ray-diagrams to show the formation of image in both the cases.

Solution : (a) Image will form between pole and focus.
(b) At focus.

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