Question

Fill in the blanks:
1. The principle used in pinhole cameras is _______________.
2. A plane mirror forms an image of an object because it ______________ light from the object.
3. An electric bulb converts electrical energy into _______________ and _______________energy.
4. A circuit in which electricity does not flow is called a/an ________________.

Answer 1

Answer:

1. rectilinear theory of light

2. The image formed by a plane mirror is always virtual (meaning that the light rays do not actually come from the image), upright, and of the same shape and size as the object it is reflecting. A virtual image is a copy of an object formed at the location from which the light rays appear to come.

3. This flow of charge converts chemical potential energy into electrical energy. In the light bulb, the flow of charge through the filament heats it up and causes it to glow. In this way, the light bulb converts electrical energy to heat energy and light energy.

4. This answer is in the picture. See it