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What is the principal axis of lens

The principal axis of a lens is the line along which light rays converge.

Light rays that pass through a lens converge at a point known as the focal point. The focal length of a lens is measured from the center of the lens to this point. The distance between the principal axis and the focal point is known as the optical axis, which is perpendicular to the principal axis. The principal axis lies in front of and behind a convex or concave lens, respectively.

What is an optical axix?

Light rays that pass through a convex or concave lens converge at a point known as the focal point. The distance between this focal point and where it intersects with an imaginary line drawn perpendicular to both sides of the lens (known as its principal axis) is known as its optical axis.

What are some examples of lenses?

Light ray through lens

Tommy Dorfman 13 reasons why

Tommy Dorfman played the character of Ryan in 13 Reasons Why.

Tommy Dorfman, who played the character of Ryan in 13 Reasons Why, is a talented actor who has been working since he was a child. He started out in commercials and made his film debut at age 9 in What Women Want, starring Mel Gibson and Helen Hunt. He’s had small roles on TV shows like Glee and Parenthood but it wasn’t until he landed the role of Tommy on Netflix’s hit show 13 Reasons Why that he became a household name. Tommy was supposed to appear in season 2 but due to health issues, he will not be returning to the show.

Who is Tommy Dorfman?

Tommy Dorfman is an American actor who was born on December 30th, 1996. His career began when he was just 3 years old when he appeared in commercials for McDonalds and Pizza Hut. At age 9, Tommy made his film debut as Alex Furlong alongside Mel Gibson and Helen Hunt in What Women Want (2000). In 2010, Tommy landed his first television role as Justin Russo on the series Wizards of Waverly Place. He went on to appear as Benjy Stone on Glee before landing his most notable role as Tommy O’Brien Jr., a recurring character on Parenthood from 2013-2015.

What has Tommy Dorfman been up to lately?

On October 26th 2018, Netflix released season 2 of their hit series 13 Reasons Why. In this season we saw some familiar faces return such as Dylan Minnette (Clay Jensen), Katherine Langford (Hannah Baker), Christian Navarro (Tony Padilla) and Alisha Boe (Jessica Davis). However one face that we were not expecting to see again was that of Ryan Shaver played by none other than Tommy Dorfman himself.

In episode 7 titled ‘There’s No Place Like Homecoming’, we see that after being suspended from school for smoking weed with Bryce Walker at prom night, Ryan is back at Liberty High School where he approaches Clay Jensen while he’s walking down the hallway after class one day.

“I’m sorry,” says Ryan apologetically.”I don’t want you mad at me.” Clay looks surprised by this apology but tells him “It’s okay” before walking away.

“It’s not okay,” says Ryan sadly.

“What do you want me to say?” asks Clay looking confused.

“I don’t know,” replies Ryan sadly.

“You can’t just apologize like that,” says Clay before adding “you have to explain why.”

“I’m sorry I left you alone with Bryce Walker,” says Ryan looking down ashamedly.”He drugged me.””Why didn’t you tell anyone?” asks Clay confused by this revelation.

“Because I thought I could handle it myself,” replies Ryan defensively.”And because I didn’t want everyone thinking I’m gay.””So why are you telling me now?” asks Clay.

Why did Facebook Stock Drop

Facebook shares dropped by more than 7% on October 26th, following the company’s announcement that it had been breached.

Facebook has suffered a major data breach that has affected 50 million users. The breach was discovered on Tuesday and was caused by a vulnerability in Facebook’s code that allowed hackers to take over user accounts. Facebook has since fixed the issue and is working with law enforcement to find out who is responsible for the attack. This isn’t the first time Facebook has been hacked, but it may be one of the most damaging incidents yet. Here’s why investors are so concerned about this breach.

What happened?

The hack occurred on Tuesday, October 25th when a security vulnerability in Facebook’s code allowed hackers to take over user accounts. The attackers were able to access users’ names, email addresses or phone numbers and potentially even their private messages and posts.

How many people were affected?

The company announced on Friday that 50 million users had been affected by the hack, which is more than twice as many as originally thought.

“This is an issue of trust,” said David Kirkpatrick, author of “The Facebook Effect.” “It’s not just people’s information they’re taking; it’s their identity.”

why pure acetic acid does not turn blue litmus to red

The fact that pure acetic acid does not turn blue litmus to red is a common chemistry experiment.

One of the most common chemistry experiments students perform in high school involves mixing a solution of blue litmus with a solution of pure acetic acid. When this happens, the mixture turns red, but if there is any water present in the mixture, it will turn blue instead. This is because acetic acid reacts with water to form acetic acid and hydrogen ions. The reaction that takes place between litmus and acetic acid is the same one that takes place between an acidic solution and a base solution, which causes both solutions to change color.

However, when pure acetic acid is mixed with water, no reaction occurs. This means that there are no hydrogen ions present for the two solutions to react with each other. The lack of hydrogen ions also means that there are no protons present for the two solutions to react with each other either. As such, no reaction occurs between pure acetic acid and water.

Why is Fortnite not working

Fortnite’s servers have been down for over 24 hours, and Epic Games has yet to release an official statement.

Fortnite’s servers have been down for over 24 hours, and Epic Games has yet to release an official statement. The outage has been affecting players around the world, with many unable to log in or even launch the game. Fortnite’s Battle Royale mode is also unavailable on all platforms, while Save the World is also experiencing issues.

While some Fortnite fans are patiently waiting for Epic Games to restore service, others are starting to lose their patience. The developers have come under fire from players on social media who are accusing them of not caring about the issue or not doing enough to fix it. Some users even claim that they were charged for their V-Bucks when they logged in during the outage.

Fortnite’s Battle Royale mode, which is free-to-play and available on PC, PS4, Xbox One and Nintendo Switch, sees 100 players dropped onto a giant island where they must scavenge weapons and build defences before battling it out until only one player remains.