The document discusses various ways that harnessing light can benefit society. It can be used for laser cutting, tissue growth through biosensors and scaffolding, and cell communication through light signals. Developing nanobots and nanodevices could help detect malicious cells early. Harnessing light also enables printing electronic circuits more cheaply. Key challenges are developing materials that don't absorb radiation and improving solar cells to provide half the world's energy by 2100. Meeting computing and communication needs worldwide through light-based technologies could also benefit humanity if UV and gamma rays are applied safely.

1. HARNESSING LIGHT:
POSSIBILITIES AND
CHALLENGES
DAISY DALES SR. SEC. SCHOOL
EAST OFKAILASH
NEW DELHI-110065

2. INRODUCTION:
HARNESSING LIGHT
1.What is Light?
It is multidisciplinary subject . This is
both art and science. It helps us to see
things around us.
2.How does it influence our lives?
Bringing the world together.
Light effects national defence and many
more.

3. • LASER- “ Light Amplification”- adding energy for
tasks such as cutting, heating, burning, or welding.
• Another use cutting of laser beams into femtoseconds-
one quadrillionth of a second.

4. • BIOSENSORS AND SCAFFOLDING : Helps in tissue growth.
• HELPING IN CELL COMMUNICATION: Helps In delivering a large bundle of
signals for communication.

5. • NANOBOTS AND NANODEVICES- To detect malicious cells at early
stage.
• HELPS IN PRINTING ELECTRONIC CIRCUITS- using more manageable and
less expensive equipment's

6. • Find or make an element that does not absorbs
radiation.
• Improvement in Photovoltaic cells that permits solar
energy to provide up to half of world energy needs by
the end of century leading to low carbon future.
• Meeting the needs of computing and
communication across the world.
• Usage of UV Rays and Gamma Rays for the benefits
of mankind.