# Help with Numerical Problem: Pointers Needed!

• pj96
In summary, numerical problems involve solving equations or manipulating numbers to find a solution. Pointers are variables used to refer to specific values in a larger set of data, making it more efficient and organized to manipulate data. They are important in solving numerical problems as they allow for easier access and updates to specific values within a dataset. To use pointers in numerical problems, it is important to properly initialize and allocate memory for them and use descriptive variable names for easier debugging.
pj96
Homework Statement
Suppose that you focus a camera directly down on a letter printed on this page.
The letter is then covered with a 2.00-mm thick microscope slide (n = 1:55). By
how much must the camera be raised in order to keep the letter in focus?
Relevant Equations
Snell's law or refraction at a spherical interface?
I'm really stuck on this and have no solution only a numerical answer! Any pointers in the right direction would be really appreciated!

Unfortunately, according to the PF guidelines,
pj96 said:
I'm really stuck on this and have no solution
does not count as an effort to try and find a solution. So we are not allowed to assist!

You could make a sketch of the two situations and that way discover what's different ...

## 1. What is a numerical problem?

A numerical problem is a problem or equation that involves numbers and requires some sort of calculation or solution. It is often used in math, science, and engineering fields.

## 2. What are pointers in relation to numerical problems?

In computer science and programming, pointers are variables that store the memory address of another variable. They are often used to indirectly access and manipulate data in a computer's memory, which can be helpful in solving numerical problems.

## 3. How can pointers be used to help with numerical problems?

Pointers can be used to allocate and access memory dynamically, which can be useful in solving numerical problems that involve large sets of data. They can also be used to pass data between functions, making it easier to manipulate and solve numerical problems.

## 4. Are pointers necessary for solving all numerical problems?

No, pointers are not necessary for solving all numerical problems. They are often used in programming and computer science applications, but there are many numerical problems that can be solved without the use of pointers.

## 5. Can pointers be difficult to understand for beginners?

Yes, pointers can be difficult to understand for beginners. It takes time and practice to fully grasp the concept and how to use pointers effectively in solving numerical problems. However, with patience and perseverance, anyone can learn how to use pointers for numerical problem-solving.

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