Conheça a verdade por trás de 4 mitos da tecnologia

7.920 Comentários / Notícias / Por

A tecnologia ainda é um mistério para muitas pessoas, que acabam acreditando em informações erradas divulgadas de maneira convincente. Abaixo estão alguns destes mitos que muitas vezes são passados como verdades absolutas deste universo, seja por inocência ou por intuito comercial. Confira:

1) LED e LCD são telas diferentes
Na verdade, toda tela de LED é feita de LCD, mas nem todas as telas de LCD têm LED. A maior diferença entre as telas de LCD e LED não está nos pixels em si, mas na iluminação entre elas.

Enquanto as telas de LCD utilizam lâmpadas fluorescentes para iluminar a tela, as TVs de LED utilizam pequenos LEDs para iluminar cada parte da tela separadamente. Isso faz com que certos LEDs possam ter sua iluminação desligada para que fiquem mais escuras, criando uma cor preta mais escura, ou seja: a parte em que os LEDs mais fazem diferença na qualidade de imagem é quando estão desligados!

2) Macs não pegam vírus
Macs pegam menos vírus do que computadores rodando Windows, mas não é sensato utilizar um Mac sem um bom antivírus. Parte do motivo pelo qual os vírus afetam mais os computadores com o sistema da Microsoft se deve ao fato de que o Windows roda em 88% das máquinas (desktops e laptops) no mundo. Com isso, torna-se mais visado, já que as ameaças criadas para um sistema operacional não funcionam no outro.

3) Câmeras com mais megapixels fazem fotos melhores
Na verdade, a quantidade de megapixels que o sensor de uma câmera possui influi pouco na qualidade de suas fotos, se comparado a outros fatores. Primeiramente, como um monitor Full HD possui apenas 2 Megapixels e os novos 4K possuem 8 Megapixels, qualquer câmera com mais resolução do que isso não vai mostrar na tela a diferença que mais megapixels fazem.

Se você der um zoom na foto, parte da imagem estará sendo jogada fora, caso em que mais megapixels fazem a diferença, assim como quando a foto será impressa, já que a resolução das impressoras fotográficas é superior à resolução das telas, em maior parte. Agora, se você costuma ver as fotos em seu monitor ou na TV, a diferença entre uma foto de 15 e 5 megapixels é o tamanho, lotando seu HD mais rápido.

4) Cabos mais caros têm som e imagem melhores
A forma mais fácil de explicar esse mito é que ele é verdadeiro para cabos analógicos e falso para cabos digitais.

Cabos que passem um sinal analógico estão sujeitos a todo tipo de interferência eletromagnética e possuem melhores defesas contra essa interferência em cabos de melhor qualidade. Neste caso, um cabo VGA de R$ 15 e um de R$250 produzirão imagens diferentes. Cabos de som de maior qualidade, também produzirão som com maior fidelidade.

Por outro lado, cabos digitais não funcionam da mesma forma. Com eles, não existe “melhor” ou “pior”. Um cabo HDMI de R$ 250 pode durar mais tempo, ser mais bonito e melhor construído do que um cabo HDMI de R$ 15, mas ele com certeza não terá uma imagem melhor. O mesmo pode ser dito para cabos USB, por exemplo. Ou eles funcionam, ou não funcionam, mas não há como um cabo funcionar “melhor” do que o outro.

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