6. A converging lens is used to project a real image of an object onto a screen.

Question

6. A converging lens is used to project a real image of an object onto a screen. The object and the screen are 100 cm apart. The focal length of the lens is 16 cm. Find two possible locations of the object (i.e., find two object distances) and the corresponding two possible locations of the image (i.e., find two image distances). 7. A diffraction grating has d- 1300 nm. (a) Identify which of the following colors (wavelengths) can be observed in the 2-order diffraction: ??-750 nm; ?2-700 nm; ?3-650 nm ?4-615nm; ?5-600 nm; ?4-410 nm, and ?7-400 nm. Justify your answers with calculations and show your work. (b) Which colors, if any, overlap (i.e., are located at the same position) in the second and third order diffractions? (Show your work). 8. A mixture of two colors of unknown wavelengths, ? falls perpendicularly on a thin film, of gasoline that is formed on a glass plate. For both wavelengths, the refractive index of gasoline is 1.45 and that of the glass plate is 1.50. The one color). On another spot, the minimum non-zero thicknesses of the film is 103.45 nm as a result of the destructive minimum non-zero thickness of the film in one spot is 77.59 nm as a result of the destructive interference (elimination of (elimination of the other color). Identify which two colors are mixed and which color is eliminated in each of the two spots. Use the table below and please show your work? Color 780 - 622 622 - 597 597-577 577-492 492 -455 455-390 red orange yellow green blue violet aus Problem (5 points) ?, m-4.0 x 10-9 kg ) is released from rest between two plates A and B. iL 10 Y and the clectric potential at plate B is 30 V. (a) From which plate to which negatively charged particle (9,--80

Explanation / Answer

6.

f = focal length = 16 cm

do = object distance = x

di = image distance = 100 - x

using lens equation

1/f = 1/do + 1/di

1/16 = 1/x + 1/(100 - x)

x = 20 or 80

hence object distance is 20 or 80

then image distance is 80 and 20 respectively

Related Questions

Navigate

• Browse (All)
• Browse 6
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.