Microscopy: Magnification, Resolution & Types of Microscopes | A-level Biology | OCR, AQA, Edexcel

[@cl5289]

can you do a video on calibration of eyepiece graticule and with stage micrometer aqa

[@gabriellaodonnell1916]

yes please can he do this i'm so lost

[@izziehardy9739]

god I hate microscopes.

[@maherzain434]

I hate my life

[@shahjohn6469]

@@maherzain434 May ALLAH give u happy life

[@maherzain434]

@@shahjohn6469 jazakallah khayr 😂❤

[@zohrabaig397]

Me too.

[@geraldelisha710]

you probably dont care at all but does any of you know of a way to log back into an instagram account?? I somehow lost the account password. I would appreciate any help you can offer me.

[@taniakinmoladun]

What about electron microscopes ?

[@btsarmy.saranghae7492]

Could u please make videos on A level chemistry too? I love the u explain things in much more deeply and in an organized way. Really helping my IBDP biology also my friends who've taken A levels

[@R50ysf]

Very good, clear explanation. Thank you.

[@zaynabmalik806]

The ONE science voiceover that ISNT nerdy or geeky or annoying aha

[@balqisrowi6237]

This video help me sooo muchh!!

[@launchpadlearn]

Glad it helped you! 💯

[@imrantaimuri2708]

What about the electron microscope and you were to brief but it was good.

[@AlwinSanchita]

What kind of microscope do I need to buy for AS/ A level Biology practical ?

[@maryam.654]

so cool , thank you

[@launchpadlearn]

You're welcome! 🧊

[@gnamp]

The diagram at 5:36 is going to confuse people- it's more-or-less upside-down relative to the typical passage of light on an actual microscope.

[@gnamp]

@Anish Lohani resolution is determined by the ability to distinguish separate things. The light microscope makes such a task easier to do.

[@gnamp]

@Anish Lohani No. Maybe these will help you understand that there is a difference between the resolution of the human eye and of a light-microscope & why magnification is another matter altogether: courses.lumenlearning.com/ap1x94x1/chapter/magnification-and-resolution/ courses.lumenlearning.com/physics/chapter/27-6-limits-of-resolution-the-rayleigh-criterion/

[@gnamp]

@Anish Lohani Good idea

[@gnamp]

@Anish Lohani Think about it this way- an image of something observed with the naked eye is 'simply' projected onto the light-sensitive cells at the back of it. Unaided, the discernable details of the image are limited by the wavelength of visible light AND acuity of vision afforded by the retina- the cells of which are fixed in terms of size, position, number & therefore density. Naturally, they will be exposed to a greater amount of detail if said image is magnified. Consider what the pixels of a computer monitor screen are able to show while zooming into a location using Google maps- you can't distinguish between houses etc. until you zoom right in (resolving power).

[@justmikey7348]

how about electron microscopes?@snap revise

[@nehabheemar9534]

well, he talks about to specific microscopes

[@Zen_Zen_Zense]

This might help, its notes that I've written down from before: ■For very small viewing things Electron microscopes can be used. Electrons have a much *lower wavelength* than light which means they can be used to produce an image with resolution as great as *0.1nm* . Electron microscopes can have a magnification of *x500000* . ■There are different types of Electron microscopes. A Transmission Electron Microscope ( *TEM* ) producers a *2D image* of a thin sample, and has a maximum resolution of *x500000* . ■A Scanning Electron Microscope ( *SEM* ) produces a *3D image* of a sample by 'bouncing' electrons off and detecting them at multiple detectors. Maximum magnification of *x100000* . the top information is notes i printed off a while back, I'm not sure which website it would be from. if you want to find the website just copy some of the lines and the website should be one of the first links. *COMPARISON* SEM: *Advantage* ■ wide arrange of application ■ detailed 3D & tepographical imaging ■ easy to operate with proper training - user friendly ■ works fast *Disadvantage* ■ expensive ■ large ■ area issue (houses in areas without magnetic, electric, vibration interferences) ■ maintenance ■ limited to sample analyse ■ small risk of radiation TEM: *Advantage* ■ most powerful magnification ■wide range of applications & used in varied fields ■images are in high quality & detail ■ able to yield info of surface features, shape, size, structure ■ easy to operate with proper training. *Disadvantage* ■ large and expensive ■ laborious sample preparation ■ requires special training ■ requires special housing and maintenance ■ images are black and white Light Microscope: *Advantage* ■ cheap to buy and operate ■ small and portable ■ natural colour of specimen is observed ■ both live and dead samples ■ preparation quick and simple ■ unaffected by magnetic field *Disadvantage* ■ magnifies max *x1500* ■ preparation may distort specimen ■ depth of field is restricted ■ has a resolution of only around 1nm Hope that helps 😁

[@Dana-gv7og]

great ! Thank you

[@nadinhanaysha1363]

when using light microscope do you start the largest or smallest distance between the lens and specimen./why??

[@l_m_a_o2178]

It depends on what lens you are talking about, if you are talking about the condenser lens, then it must be focused on the specimen (at precision) so that it’s easier for the objective lens to reflect on the eyepiece lens

[@kingjuzilla5990]

The goat

[@atlas_yt5360]

I know the cover is disposable...but can i reuse it if i want?

[@hk4560]

What’s the resolution of a laser scanning microscope? :)

[@ssekimpijulius-jf4on]

Am from Bombo Army SSS, Uganda,I liked but we need more organic chemistry too or you specialised in Biology

[@rahilaehsan4969]

Excellent!!

[@launchpadlearn]

Thank you! Cheers! 💯

[@محمدالدليمي-ت6ث5ج]

which magnification of thes microscope is better TEM or SEM and why

[@nehabheemar9534]

oh dude, nice qestion

[@Zen_Zen_Zense]

*COMPARISON* SEM: *Advantage* ■ wide arrange of application ■ detailed 3D & tepographical imaging ■ easy to operate with proper training - user friendly ■ works fast *Disadvantage* ■ expensive ■ large ■ area issue (houses in areas without magnetic, electric, vibration interferences) ■ maintenance ■ limited to sample analyse ■ small risk of radiation TEM: *Advantage* ■ most powerful magnification ■wide range of applications & used in varied fields ■images are in high quality & detail ■ able to yield info of surface features, shape, size, structure ■ easy to operate with proper training. *Disadvantage* ■ large and expensive ■ laborious sample preparation ■ requires special training ■ requires special housing and maintenance ■ images are black and white Light Microscope: *Advantage* ■ cheap to buy and operate ■ small and portable ■ natural colour of specimen is observed ■ both live and dead samples ■ preparation quick and simple ■ unaffected by magnetic field *Disadvantage* ■ magnifies max *x1500* ■ preparation may distort specimen ■ depth of field is restricted ■ has a resolution of only around 1nm

[@Zen_Zen_Zense]

Tem has the strongest magnification of x500000 Sem has a magnification of x100000

[@sumayachoudhury8200]

0 o 0 thankyou so much amazing human

[@exploremagic2258]

volume?

[@alishbakhan2684]

Great

[@launchpadlearn]

Many thanks! 😊

[@existinguser7788]

Uhhh you missed out transmission electron microscopy and scanning electron microscopy, this channel frequently misses out important information without even mentioning the information they missed. Absolutely abysmal

[@launchpadlearn]

The course we have uploaded on KZbin is just a taster of the full course. We have over 600+ videos covering every spec point available on our webiste snaprevise.co.uk

[@laithalfeeli6133]

@@launchpadlearn i cant find the video on the website. where can i find it

[@lonoos]

Ambatukam

[@fstknust9112]

its ok.but i think you were moving fast

[@Bash_the_Bash]

i literally watched it on 1.5x speed because i thought he was too slow

[@Johannes.M763]

Sir let you explain AS level biology topic by topic per video

[@daiiividgao8152]

I know some of u r here

[@SethNoub69]

0/10 video theres no girls