LED - How do the light work on the microbit?

What does LED stand for?

• Light Emitting Diode

• Luminous Electric Diode

• Light Energy Detector

• Luminous Electrical Device

What is a diode?

• A one-way valve for electricity

• A two-way switch for electricity

• A storage unit for electricity

• A generator of electricity

What happens when electric current flows through a diode?

• It creates light

• It stops flowing

• It absorbs energy

• It gives off heat

How is an LED different from a basic diode?

• It absorbs light

• It gives off light instead of heat

• It creates heat

• It stops electricity flow

What happens when you connect the positive wire to the positive lead on an LED?

• The LED changes color

• The LED blinks

• The LED turns off

• The LED turns on

What is the main application of LEDs as mentioned in the text?

• Detection, transmission, and reception

• Heating, cooling, and lighting

• Indication, communication, and illumination

• Storage, generation, and distribution

How are LEDs used for communication?

• Sending pulses of heat

• Sending pulses of sound

• Sending pulses of light

• Sending pulses of electricity

Why can't you see the light emitted by the LED in a remote control?

• It is in the infrared spectrum

• It is in the ultraviolet spectrum

• It is in the microwave spectrum

• It is in the visible spectrum

What can cameras detect that our eyes cannot in terms of LED light?

• Infrared light

• Microwave light

• Ultraviolet light

• Visible light

How can LEDs be used as a replacement for regular lightbulbs?

• By packing bright LEDs on a circuit board

• By using them for communication

• By using them for indication

• By using them for heating