Advertisements
Advertisements
प्रश्न
An object 10 cm high is placed at a distance of 20 cm in front of a spherical mirror of focal length 25 cm. By scale drawing find the nature, position, and magnification of the image in the following case:
Concave mirror
Advertisements
उत्तर
Focal length =25 cm.
Object distance = 20 cm.
Height o f object = 10 cm.
Image is virtual, erect, and magnified.
APPEARS IN
संबंधित प्रश्न
The letter F is placed in front of a plane mirror:
What is the name of the phenomenon involved?
A concave lens produces an image 20 cm from the lens of an object placed 30 cm from the lens. The focal length of the lens is:
(a) 50 cm
(b) 40 cm
(c) 60 cm
(d) 30 cm
Define the terms pole, principal axis and centre of curvature with reference to a spherical mirror.
Name the kind of mirror used to obtain :
A real and enlarged image
Choose the correct alternative and rewrite the following:
Mirror used by a dental surgeon is ..........................
Draw a ray diagram in each of the following cases to show the formation of image, when the object is placed :
(i) between the optical centre and principal focus of a convex lens.
(ii) anywhere in front of a concave lens.
(iii) at 2F of a convex lens.
State the signs and values of magnifications in the above-mentioned cases (i) and (ii).
What is the relation between focal length and radius of curvature of a concave mirror?
Define the term Focus of a concave mirror.
Name the two types of spherical mirrors.
The image formed in a plane mirror is always inverted.
