navbar brand

Article

23 Mar 2023, Thu
  • Applications
    Dictionary
    Quiz
    Converter
  • User Profile
    • image profile

      Hello Guest 👋 !

      Login Register
UI
Namaste, Guest Become a member?
  • Login
  • Register
  • Ask Question
  • Quick Access

    • Home
    • Questions
    • Profile
  • Questions

    • Ask Question
    • All Subjects
    • Accountancy
    • Astronomy
    • Biology
    • Chemistry
    • Computer
    • English
    • Environment
    • Geography
    • Geology
    • Health
    • History
    • Math
    • Nepali
    • Physics
    • Population
    • Social Studies
  • Exam Capsule

    • All Entrances
    • IOE Entrance
    • SEE Model Set
  • MCQ

    • GK Practice
    • Categories
    • Exam
    • Submit Quiz
  • Articles

    • Essay Contest
    • Latest
    • Health
    • Education
    • Sports
    • Abroad
    • Politics
    • Environment
    • Technology
  • Institutes

    • All Institutes
    • Schools
    • High Schools
    • Colleges
    • Tuition Centers
    • Library
  • Notices

    • Admission Open
    • Result
    • Loksewa
  • Top Topics

    • Electricity
    • Computer Fundamentals
    • Pressure
    • Heat
    • Waves

Invention of this device can now produce electricity using shadows

June 21, 2020

Someday, shadows and light could team up to provide power.

Electricity From Shadow
Electricity From Shadow

A new device exploits the contrast between bright spots and shade to create a current that can power small electronics. “We can harvest energy anywhere on Earth, not just open spaces,” says Swee Ching Tan, a materials scientist at the National University of Singapore.

Tan and his team created the device, called a shadow-effect energy generator, by placing a superthin coating of gold on silicon, a typical solar cell material. Like in a solar cell, light shining on silicon energizes its electrons. With the gold layer, the shadow-effect energy generator produces an electric current when part of the device lies in shadow.

The excited electrons jump from the silicon to the gold. With part of the device shaded, the voltage of the illuminated metal increases relative to the dark area and electrons in the generator flow from high to low voltage. Sending them through an external circuit creates a current that can power a gadget, Tan’s team reports April 15 in Energy & Environmental Science.

With eight generators, the team ran an electronic watch in low light. The devices can also serve as sensors. When a remote-controlled car passed by, its shadow fell on a generator, creating the electricity to light up an LED.

The greater the contrast between light and dark, the more energy the generator provides. So the team is working to boost the device’s performance by borrowing strategies from solar cells for gathering light. Increasing the light these generators absorb would allow them to better exploit shadows.

Someday, these generators might produce energy in the shadowy spots in a solar array, between skyscrapers or even indoors. “A lot of people think that shadows are useless,” Tan says. But “anything can be useful, even shadows.”

Source: sciencenews.org

by Pathshala Nepal

Related Articles

चीनको ग्वान्जाओबाट पिपिईसहित १९ स्वास्थ्य सामग्री आउँदै, तर, ल्हासाबाट आउने सामान अचानक रोकियो

चीनको व्यापारिक सहर ग्वान्जाओबाट स्वास्थ्य उपकरण, पिपिई, औषधि, कोरोना भाइरस जाँच्ने किट्स, मास्कसहितका सामान लिन नेपाल एयरलाइन्सको विशेष विमान आरए ४१७१ आज (शनिबार) दिउँसो १२:३१ मा त्यसतर्फ प्रस्थान गरेको छ ।  नेपाली जहाजले औषधि, भेन्टिलेटर, […]

ramos Health
दाहसंस्कारमा ‘नो डिस्काउन्ट’
bipinapoudel News
आदेश उल्लङ्घन गर्ने ६०० लाई ‘होल्ड’
bipinapoudel News
National Education Board cancels Grade 11 exam due to COVID-19
ramos Education
How Scientists Know Coronavirus Wasn’t Made in a Lab
bipinapoudel Education

Trending Articles

How to draw a Human skull with labeling?

The skull is made out of two arrangements of bones cranial and facial. Cranial bones are 8 in number, facial bones are 14. Thus, the skull is made of all-out 22 bones. The cranial bones […]

admin Articles
Child Rights in Nepal
bipinapoudel Articles
Why should we choose “Doctor” as a career?
bipinapoudel Articles
Five common mistakes to avoid for getting the best insurance for your needs on your minimum budget
bipinapoudel Articles
Importance of Women Education in the Rural Area of Nepal
bipinapoudel Articles

Popular Tags: 7 Days

  • development
  • political change
  • mediterranean climate region
  • winter rainfall
  • compound interest
  • Advantages of saving
  • egg sinks in pure water but floats in the salt solution
  • Cooperative
  • principles
  • functions of Legislature
  • secular
  • secular country
  • secularism
  • secularism in nepal

Upcoming MCQs

MCQ Online Exam

Computer Fundamental Multiple Choice Questions Exam Free

  • 2022-03-20 12:45
  • 60 Mins
  • 12 Enrolled
  • 25 Full Marks
  • 10 Pass Makrs
  • 25 Questions

Search

Quick Links
  • About Us
  • Terms of Use
  • Privacy Policy
  • Cookie Policy
  • Advertise With Us
  • FAQs
Our Products
  • Educational Institutes
  • Question & Answers Community
  • Online Course/Notes
  • Educational Utilities
  • Social Networking
  • Educational Store
Contact Us
Address:
Pryag Pokhari, Lagankhel, Lalitpur Nepal
Email:
[email protected]
Phones:
9745619281 or +977-9840704915

PathshalaNepal.com is a Registered Company of E. Pathshala Pvt Ltd Nepal. Registration number : 289280

© 2020. All right Reversed.E. Pathshala Pvt Ltd