OPTICS UNIVERSITYFocal length is the distance between the optical element and where the image of the object is in focus. Shorter focal lengths mean the light focuses even more, which corresponds to higher power optics.
Focal length is the distance between the optical element and where the image of the object is in focus. Shorter focal lengths mean the light focuses even more, which corresponds to higher power optics.
| Cookie | Duration | Description |
|---|---|---|
| viewed_cookie_policy | 1 year | The cookie is set by the GDPR Cookie Consent plugin to store whether or not the user has consented to the use of cookies. It does not store any personal data. |
| Cookie | Duration | Description |
|---|---|---|
| wp-wpml_current_language | session | No description available. |
| Cookie | Duration | Description |
|---|---|---|
| VISITOR_INFO1_LIVE | 5 months 27 days | A cookie set by YouTube to measure bandwidth that determines whether the user gets the new or old player interface. |
| YSC | session | YSC cookie is set by Youtube and is used to track the views of embedded videos on Youtube pages. |
| yt-remote-connected-devices | never | YouTube sets this cookie to store the video preferences of the user using embedded YouTube video. |
| yt-remote-device-id | never | YouTube sets this cookie to store the video preferences of the user using embedded YouTube video. |
| yt.innertube::nextId | never | This cookie, set by YouTube, registers a unique ID to store data on what videos from YouTube the user has seen. |
| yt.innertube::requests | never | This cookie, set by YouTube, registers a unique ID to store data on what videos from YouTube the user has seen. |
| Cookie | Duration | Description |
|---|---|---|
| _ga | 2 years | The _ga cookie, installed by Google Analytics, calculates visitor, session and campaign data and also keeps track of site usage for the site's analytics report. The cookie stores information anonymously and assigns a randomly generated number to recognize unique visitors. |
| _gat_gtag_UA_5883805_2 | 1 minute | Set by Google to distinguish users. |
| _gid | 1 day | Installed by Google Analytics, _gid cookie stores information on how visitors use a website, while also creating an analytics report of the website's performance. Some of the data that are collected include the number of visitors, their source, and the pages they visit anonymously. |
| CONSENT | 2 years | YouTube sets this cookie via embedded youtube-videos and registers anonymous statistical data. |
| tk_ai | 5 years | JetPack sets this cookie to store a randomly-generated anonymous ID which is used only within the admin area and for general analytics tracking. |
| tk_lr | 1 year | The tk_lr is a referral cookie set by the JetPack plugin on sites using WooCommerce, which analyzes referrer behaviour for Jetpack. |
| tk_or | 5 years | The tk_or is a referral cookie set by the JetPack plugin on sites using WooCommerce, which analyzes referrer behaviour for Jetpack. |
| tk_qs | 30 minutes | JetPack sets this cookie to store a randomly-generated anonymous ID which is used only within the admin area and for general analytics tracking. |
| tk_r3d | 3 days | JetPack installs this cookie to collect internal metrics for user activity and in turn improve user experience. |
| tk_tc | session | JetPack sets this cookie to record details on how user's use the website. |
| Cookie | Duration | Description |
|---|---|---|
| _icl_visitor_lang_js | 1 day | This cookie is stored by WPML WordPress plugin. The purpose of the cookie is to store the redirected language. |
| wpml_browser_redirect_test | session | This cookie is set by WPML WordPress plugin and is used to test if cookies are enabled on the browser. |