Question

13. Mirror used by Dentist.
A Concave mirror
C. Plane mirror
( )
B. Convex mirror
D. None of these
)
14. The surface behind the torch light and bulb in head light of a vehicle. (
)
B. Concave
C. Plane
D. None of these
A Convex
)
ve
15. Mirror used as a rear view mirror
A. Convex
B. Spherical
C. Plane
)
D. Concave
16.If the angel of incidence is 50°, the angle of reflection is
A 100°
.B. 130°
C. 40°
....
)
D. 50
)
17. The instrument which works on the principle of reflection of light on plane mirrors
is ...
( )
A. telescope
B. iconoscope C. kaleidoscope D. periscope
)
18. The right side of an object appears as left of the image. This is
called
(
A. lateral surface B. lateral inversion C. internal reflection D. refraction
)
)
)
ese.
)
19. If two plane mirrors are kept at right angle the number of images formed
(
A. 4
B. 3
C. 5
is
D. many​

Answer 1

Answer:

concave miror is used by dentists

Answer 2

Answer:

Concave mirror is the answer for the firest question.

Explanation: