Multiple choice

Consider the following statements:

  1. The power of lens is generally measured in candela.
  2. Spectroscopy (3D imaging) is a technique for creating or enhancing the illusion of depth in an image by means of binocular vision.
  3. Supermarket scanners emit Infra red radiations, which are harmful to environment.

Which of the given statements is/are incorrect?

  1. Only (1)

  2. Only (1) & (2)

  3. Only (1) & (3)

  4. All of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  1. Statement (1) is wrong. The power of lens is generally measured in diopter.
    2. Statement (2) is wrong. Stereoscopy (3D imaging) is a technique for creating or enhancing the illusion of depth in an image by means of binocular vision.
    1. Statement (3) is wrong. Supermarket scanners emit UV radiations, which are harmful environment.

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