What is the Difference between PSLV and GSLV?

Answer 1

Both PSLV (Polar Satellite Launch Vehicle) and GSLV are (Geosynchronous Satellite Launch Vehicle) are launch Indian vehicles used to launch satellites into polar orbit and geosyncronous orbits respectively.

The PSLV can launch satellites into sun synchronous orbits i. e. in such a way that an object on that orbit passes over any given point of the Earth's surface at the same local solar time.

The GSLV launch satellites into geostationary orbit. Geostationary orbits cause a satellite to appear stationary with respect to a fixed point on the rotating Earth. That is, if you were standing directly below a geosyncronous satellite it would always be directly above you.

The PSLV is a four-stage launch vehicle with the first stage being solid-propelled, the second liquid-propelled and third solid and the final stage cryogenic liquid. It required parts obtained from Russia.

The GSLV is a three-stage launch vehicle with the first stage being solid-propelled, the second liquid-propelled and the final stage being cryogenically propelled. It was developed by India partly to free itself from dependence on Russia.