File:Chemistry-related rear blackboard art at a classroom of Beijing 101 Middle School (20111201165624).jpg

Size of this preview: 448 × 600 pixels. Other resolution: 1,936 × 2,592 pixels.

Original file ‎(1,936 × 2,592 pixels, file size: 3.63 MB, MIME type: image/jpeg)

This file is from a shared repository and may be used by other projects. The description on its file description page there is shown below.

Wikipedia does not have a File page with this exact name.

Other reasons this message may be displayed:

If an image was recently created here, it may not be visible yet because of a delay in updating the database; wait a few minutes or try the purge function.
Titles on Wikipedia are case sensitive except for the first character; please check alternative capitalizations and consider adding a redirect here to the correct title.
If the page has been deleted, check the deletion log, and see Why was the page I created deleted?

File history

Click on a date/time to view the file as it appeared at that time.

	Date/Time	Thumbnail	Dimensions	User	Comment
current	18:00, 21 August 2021		1,936 × 2,592 (3.63 MB)	N509FZ	Uploaded own work with UploadWizard

The following file is a duplicate of this file (more details):

The following 2 pages use this file:

This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.

If the file has been modified from its original state, some details may not fully reflect the modified file.

Camera manufacturer	Apple
Camera model	iPhone 4
Exposure time	1/15 sec (0.066666666666667)
F Number	f/2.8
ISO speed rating	200
Date and time of data generation	16:56, 1 December 2011
Lens focal length	3.85 mm
Latitude	40° 0′ 6″ N
Longitude	116° 17′ 44.4″ E
Altitude	64.471 meters above sea level
Image title	化学
Width	1,936 px
Height	2,592 px
Bits per component	8 8 8
Pixel composition	RGB
Orientation	Normal
Number of components	3
Horizontal resolution	72 dpi
Vertical resolution	72 dpi
Software used	Adobe Photoshop CC 2015 (Windows)
File change date and time	01:54, 22 August 2021
Y and C positioning	Centered
Exposure Program	Normal program
Exif version	2.21
Date and time of digitizing	16:56, 1 December 2011
Meaning of each component	Y Cb Cr does not exist
APEX shutter speed	3.9112
APEX aperture	2.970853573907
APEX brightness	1.4318098720293
Metering mode	Pattern
Flash	Flash did not fire, auto mode
Supported Flashpix version	1
Color space	sRGB
Sensing method	One-chip color area sensor
Exposure mode	Auto exposure
White balance	Auto white balance
Scene capture type	Standard
Sharpness	Hard
GPS time (atomic clock)	08:56:1478
Reference for direction of image	True direction
Direction of image	210.3813559322
Date metadata was last modified	09:54, 22 August 2021
Unique ID of original document	4F6C835554D85690F04FDE62DB632E2A
Short title	化学
IIM version	26,368