Home
PLUS
AI Generator Tools
New
AI Image Generator
Delivering creativity at your imagination.
New
AI Image Upscaler
Scale your images up to 4x a click!
New
AI Generative Fill
Remove and replace objects in seconds!
New
AI Background Blur
Blur backgrounds to make subjects stand out!
AI Background Remix
Professional backgrounds for your products.
AI Image Extender
Extend your images to different ratios.
AI Writer
Best writing companion for the digital age.
AI Background Remover
Remove unwanted backgrounds easily.
123RF PLUS
Get creative solutions powered by cutting-edge AI tools.
Go PLUS
We have 2 new AI tools!
Check out AI Image Upscaler and AI Generative Fill now!
OK
Free Images
Stock
Photos
Vectors
Video
Audio
Fonts
Corporate+
Pricing
Support
en
English
Deutsch
Español
Français
Magyar
Italiano
日本語
한국어
Nederland
Język polski
Português (PT)
Русский язык
简体中文
繁體中文
Türkçe
Login
Go unlimited
Video
Options
PREMIUM
All Images
Photos
Vectors
Video
Audio
Fonts
FREE
PLUS
Slow motion of gray-haired man writing formulas on chalk board in college busy with science and calculations. Modern people, education and knowledge concept.
Play Video
Remaining Time
-0:00
Play
Progress: NaN%
Playback Rate
1.00x
Non-Fullscreen
4K UHD
MOV
3840 x 2160
25fps
176.45 MB
Download
silverkblack
Follow
Preview
Share
X
Facebook
Pinterest
Report
Why are you reporting this?
Intellectual Property - Copyright and Trademarks
Violates 123RF Policies
Repetitive/Irrelevant Content
Inappropriate/Distasteful Content
Corrupted Content
Please describe the issue in detail.
Cancel
Submit
190200600
23.04s
Stock Video
Model Release
Property Release
KEYWORDS
man
professor
scientist
teacher
chalkboard
science
writing
formulas
university
college
education
school
mature
senior
wall
class
equation
chalk board
theory
smart
mathematics
physics
project
research
blackboard
slow motion
male
knowledge
caucasian
indoors
slowmotion
hand
holding
scientific
experienced
formulae
genius
alone
handsome
equations
thoughtful
back view
calculations
clever
information
intelligent
calculation
occupation
activity
working