phys1002_sln08_sm2_2007

phys1002_sln08_sm2_2007 - 1 PHYS1002 TUTORIAL 8 SOLUTIONS...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 1 PHYS1002 TUTORIAL 8 SOLUTIONS Semester 2, 2007 1. TELESCOPE A refracting telescope consists of an objective lens and an eyepiece. The angular magnification of the telescope (observed through the eyepiece is given by For an image observed from the wrong end, i.e. the objective end of the telescope, the roles of these lenses will be reversed so that the angular magnification will be given by Thus, the angular size of the objects viewed through the wrong end of the telescope will be reduced by the ratio 2. SINGLE SLIT DIFFRACTION (a) When a wave is incident on a single slit of width a , the intensity pattern on a screen far away shows a broad central diffraction maximum that decreases to zero at an angle θ given by a λ θ = sin . Here 201 . 50 10 sin sin 1 1 = = =-- a λ θ rad. Thus the angular width of the central beam of diffracted water waves for this problem is 402 . 2 = θ rad. (b) The lateral width of the central beam is the distance between the first- order minima on either side of the central maximum, ie, twice the distance y from the on-axis maximum position to the first minimum of the diffraction pattern. We calculated the angular position of this minimum in part (a). Here we have been given L , the distance of the aperture from the screen (the harbour wall in this question), as 1500 m. The distance y is given by L y = θ tan , so that 306 = y m. Thus the central maximum formed from the diffraction of water waves will occupy 612 2 = y m along the harbour wall....
View Full Document

This note was uploaded on 11/29/2011 for the course PHYS 1002 taught by Professor Tarasplank during the Three '11 term at Queensland.

Page1 / 5

phys1002_sln08_sm2_2007 - 1 PHYS1002 TUTORIAL 8 SOLUTIONS...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online