When an object is placed just outside the focal length of a concave mirror, the image is
o smaller than the object and virtual.
o larger than the object and virtual.
o smaller than the object and real.
o smaller than the object and reversed. larger than the object and real

O larger than the object and real

Explanation:

As we know by the formula of mirror

here we know that

so we have

so we have

so magnification is given as

so here we have

so image will be larger than object and real

sonar - device which is used to find the submit submarines, sankalp ship. sonar waves consists of a transmitter and detector which are installed in the observation centre on board of a ship. the ultrasonic waves are sent into the sea at high frequency about 1000 khz in all direction.

you can cut your hand off if your not