All but one statement applies to electromagnetic radiation. that is a) radio waves are a form of electromagnetic radiation. b) electromagnetic radiation does not require a medium to travel. c) in a vacuum, electromagnetic radiation travels at the speed of light. d) electromagnetic radiation travels in the form of longitudinal waves.

A)Radio waves are a form of electromagnetic radiation.

TRUE

It is the type of electromagnetic wave with least energy range and longest wavelength range among all

B)Electromagnetic radiation does not require a medium to travel.  

TRUE

This radiation can travel through vacuum also and its speed is maximum in vacuum

C)In a vacuum, electromagnetic radiation travels at the speed of light.

TRUE  

speed of all electromagnetic radiation is same as speed of light in vacuum

D)Electromagnetic radiation travels in the form of longitudinal waves.

FALSE

All electromagnetic radiation is always in form of transverse waves

So correct options are

A, B, C

convex lenses are thicker at the middle. rays of light that pass through the lens are brought closer together (they converge). a convex lens is a converging lens. when parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus.