53 questions and answers in this section

Technology and Computing » Gadgets and Electronics

Explain why light-emitting diodes (LEDs) are more energy efficient.

Explain why light-emitting diodes (LEDs) are more energy efficient.

Light Emitting Diodes, or LEDs, emit light through a phenomenon called electroluminescence. When an electric current passes through an LED, electrons encounter electron holes—which are...

Read full answer

Explain why the remote control no longer responds when the batteries are inserted incorrectly?

Explain why the remote control no longer responds when the batteries are inserted incorrectly?

Batteries provide the electric energy essential for your remote control to work. Basically, they contain chemical substances that react together to produce an electric voltage. This voltage...

Read full answer

Explain why it is difficult to read a smartphone screen in direct sunlight?

Explain why it is difficult to read a smartphone screen in direct sunlight?

When using a smartphone screen in direct sunlight, one of the main issues is the ambient brightness around us, which is much stronger than the...

Read full answer