题目内容

透镜成像系统是把物面上物点的集合变为像面上重叠的衍射斑的集合。因而像不再是物体的准确复现,而是物体的平滑变形,孔径愈小,变形愈厉害,这种效应就是____。

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透镜成像系统中，如果不考虑衍射效应，即透镜孔径无限大，像是物体的准确复现，即点物成点像，此时的像称为___。

(True or False) According to Charity or Scam, if you can find anything about a charity on the Web or through other research, you might not want to trust the campaign.

A. True
B. False

(True or False) according to Charity or Scam, "Often the bad information is not based on truth, which makes it that much easier to believe".

A. True
B. False

(True or False)According to Charity or Scam, one trick scammers use is to send you an email or text using a name that is very close to the name of an organization you can trust.

A. True
B. False