It depends on how you live. If it is your property and it's an electric light, check the bulb, the switch, any exposed wiring or connector, circuit breaker/fuse and/or call an electrician. If you rent, call the landlord or the maintenance man.
refraction
Yes, immediately and ask for advice.
Since light is made of light, whatever speed it goes at is what we call the speed of light. So we'll always see light moving at exactly the speed of light, at least in that particular medium.
Reflection: When light is bounced back off a surface in different or same direction Deflection: When light goes through a surface but its direction has changed from before it hit the surface
What you call person who fixes light
Electrical goes in. Electromagnetic (heat and light) come out.
Light does.
There Is a Light That Never Goes Out was created on -19-11-09.
Light.
You are likely referring to the SRS light. When the SRS light goes on, it is letting you know to get the airbag system in your car checked out.
Electrical goes in. Electromagnetic (heat and light) come out.
When you call yourself it goes to the answer machine.