my first attempt in Hindi

नमस्ते शुभ संध्या,


                            मेरा नाम वन्दना शर्मा है ,मैं सेन्ट फ्रान्सिस स्कूल की एक शिक्षिका हूँ

मैं  विज्ञान पढ़ाती हूँ




धन्यवाद


         

 Namaste is usually spoken with a slight bow and hands pressed together, palms touching and fingers pointing upwards, thumbs close to the chest. This gesture is called Añjali Mudrā or Pranamasana. In Hinduism it means"I bow to the divine in you".

https://en.wikipedia.org/wiki/Namaste

Modes of heat transfer.

There are three modes of heat transfer: conduction, convection, and radiation. Any energy exchange between bodies occurs through one of these modes or a combination of them. Conduction is the transfer of heat through solids or stationery fluids. Convection uses the movement of fluids                                                                                                                                                   https://en.wikipedia.org/wiki/Heat_transfer    


          Heat transfer is the exchange of thermal energy between physical systems, depending on the temperature and pressure, by dissipating heat. The fundamental modes of heat transfer are conduction or diffusion, convection and radiation.

          

Light ..... The source

The natural agent that stimulates sight and makes things visible.

Like - "the light of the sun"

Reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated.

http://www.physicsclassroom.com/class/refln/Lesson-3/Reflection-of-Light-and-Image-Formation