Uses of Polarized Light
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To know the different uses of Polaroids in our daily life.
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Uses of Polarized Light
- 2. •Polaroid sunglasses •Liquid Crystal Display •Polarisation of Radio and Microwave signals •Quantum Cryptography •Decoration •3D effects
- 3. POLAROID SUNGLASSES • We use Polaroid sunglasses to minimise 'glare'.
- 5. LIQUID CRYSTAL DISPLAYS • is a flat panel display, electronic visual display, or video display that uses the light modulating properties of liquid crystals. Liquid crystals do not emit light directly. • LCDs are available to display arbitrary images or fixed images which can be displayed or hidden, such as pre- set words, digits, and 7-segment displays as in a digital clock. • LCDs are used in a wide range of applications including computer monitors, televisions, instrument panels, aircraft cockpit displays, and signage.
- 6. POLARISATION OF RADIO AND MICROWAVE SIGNALS • Using polarisated transmission and reception makes it possible to minimise the use of the 'airwaves'.
- 7. QUANTUM CRYPTOGRAPHY • from Greek ,kryptós means "hidden, secret“ • Graphein means "writing“ • is the practice and study of techniques for secure communication in the presence of third parties (called adversaries). • Modern cryptography exists at the intersection of the disciplines of mathematics, computer science, and electrical engineering.
- 8. APPLICATIONS OF CRYPTOGRAPHY • ATM • Computer passwords • Electronic commerce
- 9. DECORATION • The effects of birefringence can be absolutely stunning. • Birefringence - is the optical property of a material having a refractive index that depends on the polarization and propagation direction of light. • These optically anisotropic materials are said to be birefringent or birefractive.
- 11. 3D EFFECTS • RealD 3D is a digital stereoscopic projection technology made and sold by RealD Inc. • It is currently the most widely used technology for watching 3D films in theatres. Two pairs of RealD glasses demonstrating the polarization effect RealD glasses
- 12. ACTIVITY IN 3D EFFECTS
- 14. QUESTION NO. 1 ________are used in a wide range of applications including computer monitors, televisions, instrument panels, aircraft cockpit displays, and signage. LLCD/LCD’s
- 15. QUESTION NO. 2 We use Polaroid sunglasses to minimise _________. eGlare
- 16. QUESTION NO. 3 __________ is from the Greek ,kryptós means "hidden, secret“ and Graphein means "writing“ Cryp_ _gr_ _ _yCryptography
- 17. QUESTION NO. 4 _______________ is the optical property of a material having a refractive index that depends on the polarization and propagation direction of light. B_ _ _fring_ _ _ _Birefringence
- 18. QUESTION NO. 5 •It is currently the most widely used technology for watching ___________ in theatres. _D F_ lm_3D Films
Notes de l'éditeur
- Polarized sunglasses are specialized eyewear designed to reduce glare from surfaces such as water, snow, and glass. Glare distorts the true color of objects and makes them harder to distinguish. Polarized sunglasses can be useful for certain sports and driving, helping participants to see more clearly and avoid potential hazards. Polarized lenses are available in a variety of colors, depending on the material from which the lenses are made. Darker colors provide higher levels of polarization.
- They are common in consumer devices such as DVD players, gaming devices, clocks, watches, calculators, and telephones, and have replaced cathode ray tube (CRT) displays in most applications. The LCD screen is more energy efficient and can be disposed of more safely than a CRT. Its low electrical power consumption enables it to be used in battery-powered electronic equipment.
- Cryptography (or cryptology; from Greek κρυπτός kryptós, "hidden, secret"; and γράφειν graphein, "writing", or -λογία -logia, "study", respectively)[1] is the practice and study of techniques for secure communication in the presence of third parties (called adversaries).[2] More generally, it is about constructing and analyzing protocols that block adversaries;[3] various aspects in information security such as data confidentiality, data integrity, authentication, and non-repudiation[4] are central to modern cryptography. Modern cryptography exists at the intersection of the disciplines of mathematics, computer science, and electrical engineering. Applications of cryptography include ATM (Automatic Teller Machines) cards, computer passwords, and electronic commerce.