Which one of the following statements is correct?
The image formed by a concave mirror for an object lying at infinity is at the principal focus, highly diminished, real and inverted
A ray of light parallel to the principal axis after reflection from a concave mirror appears to diverge from the principal focus of the mirror
The focal length of a spherical mirror is equal to its radius of curvature
A concave mirror can never form a real image for a dense medium
For election to the Lok Sabha, a nomination paper can be filed by
Miscellaneous · Easy
In a month if the seventh day is three days earlier than Saturday,then the nineteenth day of the month will be a
Miscellaneous · Easy
Which among the following events happened earliest ?
Miscellaneous · Easy
An 80-litre solution of alcohol and water has 75% alcohol. How much water (in litres) must be added to bring down the concentration of alcohol to 60%?
Miscellaneous · Easy