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Adjust the beam current through the available range. The actual value is shown on the display on the control console. Observe the variations in the image and the waveform. NOTE: Why does the image appear 'out of focus' at the higher beam current setting? What is the reason for the 'snowy' or 'grainy' appearance of the image at the lowest beam current? What is the optimum beam current value for observing this specimen??QUITNon mouseUp close window "advice - current" end mouseUp  +<BHF1@tl2leNRNw>o!!x!`!  <Bje !9P@jf*-!9P@g"!!IMAGE WAVEFORMoyThe digitised signal along a horizontal line across the centre of the electron image is shown in this window (= waveform). The level of the signal is the brightness of the image; the range of the signal is the image contrast. SEM Operating instructions/on mouseUp end mouseUp   <Bt window name.@\RNw>o,outhtLu  <Bt_}u|s g9_}uPt g9_}tt4 `n~tu NEXT/on mouseUp end mouseUp   <BeNEXT;on mouseUp go next card end mouseUp  <BQUITJon mouseUp close window "help - focus" end mouseUp  (<BPREVIOUS?on mouseUp go previous card end mouseUp  <B@$)wothtt4hl2less  <Badvice - current`(JXotTu,u  <B3@XX,ott4u|t   <Bt_}uPt g9_}tt g9_}u,t `n~tt NEXT/on mouseUp end mouseUp   <BeNEXT;on mouseUp go next card end mouseUp  <B QUITJon mouseUp close window "help - focus" end mouseUp  "<BPREVIOUS?on mouseUp go previous card end mouseUp  <B@,ot`u|t  )}o## #H#(  <B fj#ߴ@jWz#ݼ@*d@@nj.v#@j72#ߘ@j H#|@j6#@4F-# bt-#߀ -#ݠ -#߬ K                    ELECTRON COLUMN O   CRT Y@The sample is tilted towards the SE detector to:A : make the detector collection efficiency uniform across a flat sample at low magnification B : avoid hitting the x-ray detector C : improve SE collection efficiency D : reduce variations across the sampleQuestion 12?I+Click on the 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