The diamond sheds beautiful light when it receives the sun's light.

In urban areas, light pollution obscures the starry sky.

My new computer can read optical discs.

Optical communication is a very efficient method for data transmission.

The moon is shining brightly.

A high-speed optical line is installed in my house.

It is important for each person to fulfill their role.

I got zero on the test.

Please turn on the light in the room.

My house is in the middle of the town.