Apical dominance in plans is due to the presence

A concave lens has a focal length 15 cm. If the object is placed at 30 cm from the lens, what is the image distance?

The device used for locating submerged objects under sea is –

Which pioneer of the late 19th century is credited with using radio waves for signal transmission over several kilometers?

Cell was discovered by

Which atmospheric layer contains ozone layer?

Minimum Distance for proper vision is 

Pulsars are :

Heat stored in water vapour is –

How does an earphone convert electrical signals into sound?

With reference to the types of electromagnetic waves, consider the following statements: