Class 10 Physics1)
An object is placed at a distance of 0.25 m in front of a plane mirror. The distance between the object and image will be
Distance between object and image = 0.25 + 0.25 = 0.5 m
Class 10 Physics2)
The angle of incidence for a ray of light having zero reflection angle is
For reflecting surface ∠i = ∠r
Class 10 Physics3)
For a real object, which of the following can produce a real image?
Only concave mirror can produces a real image for the any position of object between its focus and infinity.
Class 10 Physics4)
Which of the following mirror is used by a dentist to examine a small cavity?
Concave mirror forms erect and enlarged image when held close to the cavity.
Class 10 Physics5)
An object at a distance of 30 cm from a concave mirror gets its image at the same point. The focal length of the mirror is
– 15 cm
When object is placed at 2F, the image formed by concave mirror is also at 2F.
So 2F = -30 or F = -15 cm.
Class 10 Physics6)
An object at a distance of + 15 cm is slowly moved towards the pole of a convex mirror. The image will get
diminished and virtual
Convex mirror always formed virtual and diminished image.
Class 10 Physics7)
A concave mirror of radius 30 cm is placed in water. It’s focal length in air and water differ by
The focal length of spherical mirror does not depends on the surrounding medium.
Class 10 Physics8)
The image formed by concave mirror is real, inverted and of the same size as that of the object. The position of object should be
between focus and centre of curvature
When object lies at C of a concave mirror, image is also formed at ‘C’ and having same size real and inverted.
Class 10 Physics9)
The nature of the image formed by concave mirror when the object is placed between the focus (F) and centre of curvature (C) of the mirror observed by us is
real, inverted and enlarged
When object lies between C and F, the real, inverted and enlarged image is formed beyondC.
Class 10 Physics10)
The nature of image formed by a convex mirror when the object distance from the mirror is less than the distance between pole and focal point (F) of the mirror would be
virtual, upright and diminished in size
Convex mirror always forms a virtual, erect diminished image irrespective of the position of object in front of it.