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physicsclassroom.com

https://physicsclassroom.com· First analyzed 26 Apr 2026· Updated 26 Apr 2026
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physicsclassroom.com
Desktop screenshot of physicsclassroom.com
Mobile screenshot of physicsclassroom.com
Mobile

Sponsored

Hosting Provider

Microsoft Azure
azure.microsoft.com

IP Address

20.118.40.14

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Des Moines, United States

ASN

AS8075

Organization

Microsoft Azure App Service (centralus)

CDN

CDN

Nameservers

olga.ns.cloudflare.com.jeff.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
428 ms10%
Speed Index
556 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.1 MB
58 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Kentico

Technology Stack

6 Technologies Detected

Analytics

2
Google Analytics
FullStory

Advertising

2
Google AdsGoogle AdSense

CSS Frameworks

1
Tailwind CSS

Tag Managers

1
Google Tag Manager

SEO Analysis

D57/100
15
8
0
Meta Tags7/15
Content10/12
Headings8/8
Technical16/25
E-E-A-T0/7
Images0/7
Links3/5
URL5/5
Social2/5
Freshness0/4
Mobile3/4
Indexability3/3
P
physicsclassroom.comphysicsclassroom.com

The Physics Classroom

The Physics Classroom serves students, teachers and classrooms by providing classroom-ready resources that utilize an easy-to-understand language that makes ...

Description truncated.
Title Length21 chars

Recommended: 50-60 chars (~128px / 580px)

Description Length359 chars

Recommended: 120-160 chars

Issues (0)

    8 issues found

    Upgrade to view details

    Crawlability

    Sitemap
    robots.txt

    2 rules

    Local SEO

    Local Search Readiness

    7/100
    Poor
    3 13 2

    This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

    Sponsored

    AI & LLM Readiness

    F38/100
    Bot Access
    20/25
    Machine Read.
    7/25
    Schema Data
    0/25
    Citation
    11/25

    AI Bot Access

    14/14 accessible
    AI Search
    OAI-SearchBot
    PerplexityBot
    Claude-SearchBot
    Gemini-Deep-Research
    DuckAssistBot
    Training
    GPTBot
    ClaudeBot
    Google-Extended
    Meta-ExternalAgent
    Bytespiderinfo
    Amazonbot
    Applebot-Extended
    CCBotinfo
    Fetch
    ChatGPT-User

    Machine Readability

    llms.txt
    llms-full.txt
    Semantic HTML
    Heading Hierarchy
    Text ratio:4%
    Words:2,215
    Token eff.:Optimal

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary231w
    Descriptive Headings
    Canonical URL
    Open Graph3/3
    Twitter Card0/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (12)
    AI readiness recommendation preview...
    Upgrade to view recommendations

    Sponsored

    Accessibility

    WCAG 2.1 Compliance

    Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
    B
    75/100
    11
    Passed
    3
    Critical
    2
    Warnings
    Images & Alt Text
    20/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    10/20
    Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
    Forms & Inputs
    15/15
    Verifies form fields have labels, error messages are clear, and inputs are properly associated.
    Color & Contrast
    15/15
    Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
    Keyboard & Focus
    11/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    4/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    2 recommendations
    • •Accessibility recommendation preview...
    Upgrade to view recommendations

    Carbon Footprint

    SWDM v4 · Eco-Score

    Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
    49/100
    B
    116 mg
    CO₂e / view
    1.1 MB
    Page Weight
    70%
    Cleaner Than
    New Visitor
    132 mg
    vs
    Returning (cached)
    66 mg
    Annual (10K/mo)
    13.9 kg
    Emission Segments
    Data Center
    6 mg
    Network
    34 mg
    Device
    76 mg
    Resource Breakdown
    JavaScript
    486.9 KB
    Images
    3.5 KB
    CSS
    149.6 KB
    HTML
    369.0 KB
    Other
    137.8 KB
    Green Hosting Verified
    Microsoft Azure
    Provider Match
    5 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    F

    Security Score

    36%Critical
    Interactive

    HTTPS

    No WAF

    77d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Sectigo Limited

    Key Algorithm

    RSA (2048 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2

    Valid From

    05.08.2025

    Valid Until

    12.07.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (2)

    *.physicsclassroom.comphysicsclassroom.com

    SHA-256 Fingerprint

    3A:FF:C5:36:60:C2:A3:72:2F:53:B0:C6:46:5D:1E:3C:28:4C:47:46...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    access-control-allow-origin
    https://www.physicsclassroom.com https://accounts.google.com
    content-disposition
    inline; filename="nCNWJdxY74eY6bXoZWeQ4BYWig7SLBKE5WEaP3stfM...
    content-type
    text/html; charset=utf-8
    date
    Sun, 26 Apr 2026 12:06:42 GMT
    strict-transport-security
    max-age=2592000
    x-azure-ref
    20260426T120642Z-15dc6cb7f5f22cgshC1ROM348s0000000eeg0000000...
    Good Warning Issue

    Email Infrastructure

    Microsoft 365

    Score

    93

    SPF
    DKIM
    DMARC

    DMARC Policy

    Quarantine (Moderate)

    MX Records (1)

    physicsclassroom-com.mail.protection.outlook.com

    Domain Information

    physicsclassroom.com

    Domain Age
    25y 2m

    Created

    07.02.2001

    Expires

    07.02.2028

    Last Updated

    09.12.2024

    Registrar

    Network Solutions, LLC

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Quantcast Choice

    Cookie Consent Banner
    Quantcast Choice
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Cookie consent banner detected
    CMP: Quantcast Choice
    Privacy policy page linked

    Mobile Compatibility

    Viewport & Responsive Test

    Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
    B
    70/100
    Mobile Friendly18 breakpoints
    Viewport Meta
    The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
    Responsive Design
    Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
    Touch Icons
    Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
    Readable Font Size
    Base font size should be at least 16px on mobile to ensure text is readable without zooming.
    Relative Units
    Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
    No H-Scroll Risk
    No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
    Tap Targets OK
    Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
    No Fixed Widths
    No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
    Viewport
    width=device-width, initial-scale=1
    3 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Inter

    WCAG Partial
    71/100
    Readability
    /30
    22/30

    16px · LH 1.50

    Hierarchy
    /20
    17/20

    1.8x ratio · ✓ H1→H6

    WCAG
    /25
    19/25

    1:1 min contrast

    Performance
    /25
    13/25

    1 font · 1 req

    Heading Font

    Inter

    Sans29px

    Body Font

    Inter

    Sans16px

    Contrast Ratio

    1:1

    1 issue

    Reading Comfort

    ~39 CPL

    Narrow lines
    29px
    h1
    26px
    h2
    16px
    p

    ✅ Excellent readability: 16px body text is ideal for all devices.

    ✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

    ⚠️ Hard to read: Flesch score 48/100. Simplify sentences for wider reach.

    ⚠️ Partial contrast: 1 elements below WCAG AA threshold (min 1.0:1).

    ✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

    ✅ Lean font stack: 1 font families keeps load times fast.

    Buy on MyFontsFlesch 49

    Color Palette

    6 unique colors
    Light
    #ffffff
    Background· 79.6%
    #c74900
    Primary· 7.8999999999999995%
    #cac3bc
    Secondary· 4.5%
    #ae9a90
    Secondary· 4%
    #bd5d23
    Accent· 0.9%

    Business & Marketing Stack

    3 Tools Detected

    Advanced

    Behavior Analytics

    2
    Google Tag ManagerFree
    Google AnalyticsFree

    User behavior and product analytics

    Advertising

    1
    Google AdsEnterprise

    Ad platforms and retargeting pixels

    2

    Categories

    3

    Total Tools

    1

    Enterprise

    0

    Mid-Market

    Assessment: Well-developed marketing technology stack

    Ad Networks

    Google AdSenseGoogle Ad ManagerMediavinePrebid.js

    Sponsored

    Scripts & Styles

    26 Resources

    20
    Scripts
    6
    Styles
    12
    Async
    0
    Defer

    Top Script Sources

    a.pub.network(3)securepubads.g.doubleclick.net(3)cdn.privacy-mgmt.com(3)cse.google.com(2)scripts.mediavine.com(2)

    Website Identity

    physicsclassroom.com

    25 years old
    Location detected: 🇺🇸 United Statesvia ip
    Network Solutions, LLC📧 Microsoft 365en

    Sponsored

    Last analyzed: 26 Apr 2026 at 12:07

    Historical Analysis & Change Tracking