Nonreflective coatings for camera lenses reduce the loss of light at various surfaces of multi-lens systems, as well as preventing internal reflections that might mar the image. Find the minimum thickness of a layer of magnesium fluoride (n = 1.38) on flint glass (n = 1.66) that will cause destructive interference of reflected light of wavelength ? = 550 nm, a wavelength which is near the middle of the visual spectrum.
What will be an ideal response?
99.6 nm
Physics & Space Science
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A person's eye lens is 2.7 cm away from the retina. This lens has a near point of 25 cm and a far point at infinity
(a) What must the focal length of this lens be in order for an object placed at the near point of the eye to focus on the retina? (b) What must the focal length of this lens be in order for an object placed at the far point of the eye to focus on the retina?
Physics & Space Science
The universe was ________ old when electrons and positrons formed
Fill in the blank(s) with correct word
Physics & Space Science
Which of the following ions is isoelectronic with an argon atom?
a. Cl- b. Na+ c. F- d. S2+
Physics & Space Science
The work you do is 4 J
Indicate whether the statement is true or false
Physics & Space Science