Can infrared waves be reflected

Answer 1

Yes, by the ionosphere, which is how we can receive signal of radio waves even if the earth's curvature is in the way of the straight route of the wave from the emitter to the receiver. The ionosphere basically stops radiowaves passing up and out of the earth's atmosphere, instead they are reflected back down to earth and picked up by the receiver.

Answer 2

No. Two or more beams of radiation (electromagnetic radiation, or energy) normally pass through one another without any interaction.

Particle Colliders

The word radiation is also confusingly used when speaking of alpha and beta decay, which actually consists of particles. These can reflect, or more correctly collide. The folks at CERN are spending a lot of money on forcing a high energy particle (that could be considered ionizing radiation) to hit another similar particle and produce useful information on fundamental physics.

In nature, the chance of impact between these two particles is quite low, so intersecting streams of these particles are more likely to affect each other due to magnetic field effects than by actual reflection or deflectiion.

Answer 3

Sure. Heat waves get reflected just like light waves.

Answer 4

Yes it can.