Advertisements
Advertisements
प्रश्न
An object is 100 mm in front of a concave mirror which produces an upright (erect image). The radius of curvature of the mirror is ______.
विकल्प
Less than 100 mm
Between 100 mm and 200 mm
Exactly 200 mm
More than 200 mm
उत्तर
An object is 100 mm in front of a concave mirror which produces an upright (erect image). The radius of curvature of the mirror is more than 200 mm.
Explanation:
The reason being, a concave mirror forms an erect image when an object is placed between the focus and the pole. Further, the radius of curvature is twice the distance between the focus and the pole. This gives a radius of curvature greater than 200mm.
APPEARS IN
संबंधित प्रश्न
Draw a ray diagram for concave mirror when the object is between centre of curvature and focus.
The radius of curvature of a spherical mirror is 20 cm. What is its focal length?
An object is placed at a distance of 12 cm in front of a concave mirror of radius of curvature 30 cm. List four characteristics of the image formed by the mirror.
For what position of an object, a concave mirror forms a real image equal in size to the object?
between its pole and focus
Describe the nature, size and position of the image formed in each case.
State one use of concave mirror bases on the formation of image as in case (i) above.
A concave mirror has a focal length of 25 cm. At which of the following distance should a person hold his face from this concave mirror so that it may act as a shaving mirror?
(a) 45 cm
(b) 20 cm
(c) 25 cm
(d) 30 cm
Give reason for your choice.
A convex mirror is used as a shaving mirror.
Study the following ray diagram and list two mistakes committed by the student while tracing it. Rectify these mistakes by drawing the correct ray diagram to show the real position and size of the image corresponding to the position of the object AB.
Pick out the concave and convex mirrors from the following and tabulate them.
Rear-view mirror, Dentist’s mirror, Torchlight mirror, Mirrors in shopping malls, Make-up mirror.
Under which of the following conditions a concave mirror can form an image larger than the actual object?
