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Illuminance
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Digital Natives: Blockchain, NFT, Cryptocurrency
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Blockchain, Crypto and DeFi : Bridging Finance and Technology
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What is the unit for illuminance?
The unit for illuminance is the lux (lx). Lux is defined as one lumen per square meter. It is used to measure the amount of light that falls on a surface, indicating the brightness or intensity of light at that point. Lux is commonly used in lighting design, photography, and other applications where the level of light is important.
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What is Digital Technology 2?
Digital Technology 2 is a course that builds upon the foundational concepts introduced in Digital Technology 1. It delves deeper into topics such as programming, web development, data analysis, and cybersecurity. Students will further develop their skills in using digital tools and technologies to solve real-world problems and gain a more advanced understanding of how technology impacts society. The course aims to prepare students for a career in the rapidly evolving field of digital technology.
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How do you calculate the investment costs for technology?
To calculate the investment costs for technology, you need to consider the initial purchase price of the technology, any installation or setup costs, ongoing maintenance and support fees, and any potential training costs for employees. Additionally, you should factor in the potential return on investment (ROI) of the technology, including any cost savings or revenue generation it may enable. It's important to thoroughly research and analyze all potential costs and benefits before making a technology investment decision.
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What is the reason that the illuminance of a surface decreases by a quarter of its value when the distance to the light source is doubled?
The illuminance of a surface decreases by a quarter of its value when the distance to the light source is doubled because of the inverse square law. This law states that the intensity of light at a point is inversely proportional to the square of the distance from the source. When the distance is doubled, the light is spread out over four times the area, resulting in a decrease in illuminance by a factor of four. This is why the illuminance decreases by a quarter of its value when the distance to the light source is doubled.
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Digital Illuminance Light Meter Tester 200,000Lux Meter Luxmeter Lighting Intensity Brightness
Digital Illuminance Light Meter Tester 200,000Lux Meter Luxmeter Lighting Intensity Brightness
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Digital Light Meter Illuminance Tester Luxmeter Illuminometer Auto Shutdown LCD Display
Feature: 1. Wide Test Range: Comes with wide test range of 0.1‑200000lx and 0.01‑20000Fc, this light meter supports auto ranging among 4 ranges. 2. Higher Accuracy: Enables 2 times testing per second, the illuminance tester has high accuracy in measurement, the result is . 3. Digital Display: Large LCD screen ensures clear digital display, which will also largely simplify and improve efficiency. 4. Other Functions: There are other functions as well, including date retention, auto shutdown, auto ranging and so on, simple to use. . Simple Carrying: Designed to have a light weight and a compact size as well, the illuminometer allows for easy carrying for outdoor. Specification: Item Type: Digital Light Meter Material: ABS Battery: 1 x 9V 6F22 battery, shipped without battery. Display: Large LCD screen display. Measuring Range: 0.1~20000lx, 0.01~20000 Fc Accuracy: ± 4% Measurement Speed: 2 times per second. Unit: Lx, Fc Range: Auto ranging. Automatic Shutdown: About minutes. Package List: 1 x Digital Light Meter 1 x User Manual
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HABOTEST HT603 Digital Lux Meter Light Meter 200,000 Lux Digital Illuminance Meter with LCD
The product is a lux meter. Visible light emitted by fluorescent lamp, metal halide lamp, high voltage sodium lamp or incandescent lamp can be measured.? Features: 1. LCD Backlight Display: LCD display with backlight for easy operation in darkness. 2. Practical Functions: Support data hold / Max / Min / temperature unit selection ( celsius or Fahrenheit ) / unit selection ( Lux or FC ). 3. Ambient Humidity and Temperature: In addition to measure visible light, it can measure the environment humidity and temperature. 4. Compact Size: Mini lux meter with stable, safe and reliable measurement. Light and compact, so you can hold and carry it conveniently. 5. Auto Power Off: The meter has an automatic power off feature that conserves battery energy. After 10 minutes the meter automatically shuts off.? Note: 1. Due to manual measurement, the size may be slightly different. Thank you for your understanding. 2. Due to different light conditions and different monitors, item color displayed in photos may be showing slightly different from real object. Specifications: Brand: HABOTEST Model: HT603 Display: LCD Color: Black & Red Shell Material: ABS? Light Measurement: Range: (LUX) 1000/10000/200000, (FC) 100/1000/20000 Accuracy: 2854 degrees K incandescent lamps:?±(3percent +5 words)? Other: ±(6percent +5 words)? Temperature?Measurement: Range:?-20.0 celsius ~60.0 celsius (-4.0 Fahrenheit ~140.0 Fahrenheit ) Accuracy:? 0.0 celsius ~45.0 celsius (32 Fahrenheit ~113 Fahrenheit ): ±1.0 celsius /2.0 Fahrenheit ? Other: ±1.5 celsius /3.0 Fahrenheit Humidity?Measurement: Range:?0.0percent ~99.9percent RH Accuracy:? 20percent ~80percent : ±5.0RH? Other: ±6.0RH Cosine Angle Deviation Characteristics: 30 degrees ±2percent , 60 degrees ±6percent , 80 degrees ±25percent Sensor: Silicon photo-diode and spectral response filter Operating Conditions: Temperature: 0~40 degrees C, Humidity: less than 80percent RH, Altitude: less than 2000m Storage Conditions: Temperature: -10~50 degrees C, Humidity: less than 80percent RH Sampling Rate: Approx. 2 times per second Spectral Range: 320~730nm Auto Power Off: 10 minutes Power: 3 x 1.5V AAA batteries ( not included ) Item Size: 14*5.8*2.6cm / 5.51*2.28*1.02in Net Weight: 140g / 4.94oz Packing Size: 18.5*9*5.5cm / 7.28*3.54*2.17in Packing Weight: 212g / 7.48oz Package List: 1 * Digital Lux Meter 1 * Cloth Bag? 1 * Manual ( English )
Price: 35.64 € | Shipping*: 0.0 € -
HABOTEST HT603 Digital Lux Meter Light Meter 200,000 Lux Digital Illuminance Meter with LCD
The product is a lux meter. Visible light emitted by fluorescent lamp, metal halide lamp, high voltage sodium lamp or incandescent lamp can be measured.? Features: 1. LCD Backlight Display: LCD display with backlight for easy operation in darkness. 2. Practical Functions: Support data hold / Max / Min / temperature unit selection ( celsius or Fahrenheit ) / unit selection ( Lux or FC ). 3. Ambient Humidity and Temperature: In addition to measure visible light, it can measure the environment humidity and temperature. 4. Compact Size: Mini lux meter with stable, safe and reliable measurement. Light and compact, so you can hold and carry it conveniently. 5. Auto Power Off: The meter has an automatic power off feature that conserves battery energy. After 10 minutes the meter automatically shuts off.? Note: 1. Due to manual measurement, the size may be slightly different. Thank you for your understanding. 2. Due to different light conditions and different monitors, item color displayed in photos may be showing slightly different from real object. Specifications: Brand: HABOTEST Model: HT603 Display: LCD Color: Black & Red Shell Material: ABS? Light Measurement: Range: (LUX) 1000/10000/200000, (FC) 100/1000/20000 Accuracy: 2854 degrees K incandescent lamps:?±(3percent +5 words)? Other: ±(6percent +5 words)? Temperature?Measurement: Range:?-20.0 celsius ~60.0 celsius (-4.0 Fahrenheit ~140.0 Fahrenheit ) Accuracy:? 0.0 celsius ~45.0 celsius (32 Fahrenheit ~113 Fahrenheit ): ±1.0 celsius /2.0 Fahrenheit ? Other: ±1.5 celsius /3.0 Fahrenheit Humidity?Measurement: Range:?0.0percent ~99.9percent RH Accuracy:? 20percent ~80percent : ±5.0RH? Other: ±6.0RH Cosine Angle Deviation Characteristics: 30 degrees ±2percent , 60 degrees ±6percent , 80 degrees ±25percent Sensor: Silicon photo-diode and spectral response filter Operating Conditions: Temperature: 0~40 degrees C, Humidity: less than 80percent RH, Altitude: less than 2000m Storage Conditions: Temperature: -10~50 degrees C, Humidity: less than 80percent RH Sampling Rate: Approx. 2 times per second Spectral Range: 320~730nm Auto Power Off: 10 minutes Power: 3 x 1.5V AAA batteries ( not included ) Item Size: 14*5.8*2.6cm / 5.51*2.28*1.02in Net Weight: 140g / 4.94oz Packing Size: 18.5*9*5.5cm / 7.28*3.54*2.17in Packing Weight: 212g / 7.48oz Package List: 1 * Digital Lux Meter 1 * Cloth Bag? 1 * Manual ( English )
Price: 25.98 £ | Shipping*: 0.0 £
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How do I calculate the illuminance at different distances if the measurement in lux is given at a distance of one meter from the light source?
To calculate the illuminance at a different distance from the light source, you can use the inverse square law. This law states that the illuminance is inversely proportional to the square of the distance from the light source. So, if the illuminance is given at one meter, you can calculate the illuminance at a different distance by using the formula: E2 = E1 * (d1/d2)^2, where E1 is the illuminance at one meter, d1 is the distance at which E1 is measured, E2 is the illuminance at a different distance, and d2 is the distance at which E2 is to be calculated.
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Is the truth table in digital technology correct?
Yes, truth tables in digital technology are correct and reliable tools for analyzing the behavior of logic gates and circuits. They provide a systematic way to determine the output of a logic gate based on all possible input combinations. By using truth tables, engineers can ensure the accuracy and predictability of digital systems, making them an essential component in the design and verification process.
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Is the truth table correct in digital technology?
Yes, truth tables are an essential tool in digital technology as they provide a systematic way to represent the relationship between inputs and outputs of logical gates. By using truth tables, engineers can analyze and design complex digital circuits accurately. The truth table ensures that the logic gates operate correctly based on the defined input-output relationships, making it a crucial component in digital technology.
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How is a blockchain structured?
A blockchain is structured as a decentralized, distributed ledger that records transactions across a network of computers. Each block in the chain contains a list of transactions, a timestamp, and a reference to the previous block, creating a chronological and immutable record of all transactions. The network of computers, or nodes, work together to validate and add new blocks to the chain through a consensus mechanism, such as proof of work or proof of stake. This structure ensures that the blockchain is secure, transparent, and resistant to tampering or fraud.
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