Sunday, August 12, 2012

physics

Which of the following is the correct formula for focal point calculation?

A. F= I + O
B. 1/F = I x 1/O
C. F = 1 x 1/O
*D. 1/F = 1/I + 1/O

 Which of the following is the correct formula for lens power (P)?

A. P = 1/f + 1/O
*B. P = 1/f
C. P = f x O
D. P = O/f

 The absolute index of refraction for a substance is 2.0 for light having a wavelength of 5.9 x 10-7 meter. In this substance what is the critical angle for light incident on a boundary with air?

A. 25 Degrees
*B. 30 Degrees
C. 35 Degrees
D. 40 Degrees

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