The shiny liquid metal in the thermometer is
Copper
Iron
Silver
Mercury
A very narrow tube in a thermometer is called a
Capillary tube
Vascular tube
Electrical tube
None of these
A spherical mirror in which the outer surface is reflecting is called a
Concave mirror
Convex mirror
Plane mirror
Which of the following is used as shaving mirrors?
A mirror in which the inner hollow surface is the reflecting surface is called a
In a concave mirror, if the object is at infinity then the image formed is at
Infinity
The focus
The centre of curvature
The pole
Heat is a form of
Energy
Matter
Force
In a concave mirror, if the object is at the focus, the image is
At infinity
At the focus
Behind the mirror
At the centre of curvature
The distance between the pole and the principle focus is called
Radius of curvature
Principle axis
Aperture
Focal length
Which of the following is denoted by P.?
Principle focus
Pole
Principal axis
