Which statement about images is correct? A) A virtual image ...

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Which statement about images is correct?
 
  A) A virtual image cannot be formed on a screen.
  B) A virtual image cannot be viewed by the unaided eye.
  C) A virtual image cannot be photographed.
  D) A real image must be erect.
  E) Mirrors always produce real images because they reflect light.

Question 2

An electron is confined in a one-dimensional box (an infinite well).
 
  Two adjacent allowed energies of the electron are 1.068  10-18 J and 1.352  10-18 J. What is the length of the box? (h = 6.626  10-34 J  s, mel = 9.11  10-31 kg)
  A) 1.9 nm
  B) 0.93 nm
  C) 1.1 nm
  D) 2.3 nm

[choc0chan]

Answer to Question 1

A

Answer to Question 2

A

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Thank you!

[choc0chan]

Always glad to help...