" 2.In torches,search lights and headlights of vehicles the bulb is placed "

Concave mirrors are used as reflectors in the headlights of vehicles, torch lights. Where is the bulb placed ?

What type of mirror is used in search lights and head lights of vehicles?

Concave mirror is used in headlights of vehicles, because it

Filament of a torch bulb is

Which fuel used in light vehicles?

In the concave reflector of a torch, the bulb is placed :