Physical constants (speed of light, Planck) in SciPy - Mini Project: Build & Apply

Using Physical Constants with SciPy

📖 Scenario: Scientists often use important physical constants like the speed of light and Planck's constant in their calculations. These constants help us understand the universe better.

🎯 Goal: You will create a small program that stores some physical constants from SciPy, selects one based on a condition, and then prints it out.

📋 What You'll Learn

Use the scipy.constants module to access physical constants

Create a dictionary with the speed of light and Planck's constant

Set a threshold value to compare the constants

Use a loop to find constants greater than the threshold

Print the constants that meet the condition

💡 Why This Matters

🌍 Real World

Scientists and engineers use physical constants in calculations for physics, chemistry, and engineering problems.

💼 Career

Knowing how to access and use physical constants programmatically is useful for data scientists working in scientific research and development.

1

Create a dictionary with physical constants

Import scipy.constants as const. Create a dictionary called phys_constants with two entries: 'speed_of_light' set to const.c and 'planck' set to const.h.

SciPy

# Import scipy.constants as const
# Create phys_constants dictionary with 'speed_of_light' and 'planck'
# Your code here

Need a hint?

Use import scipy.constants as const to access constants. Then create a dictionary with keys 'speed_of_light' and 'planck' using const.c and const.h.

2

Set a threshold value

Create a variable called threshold and set it to 1e-30.

SciPy

import scipy.constants as const
phys_constants = {'speed_of_light': const.c, 'planck': const.h}
# Create threshold variable set to 1e-30
# Your code here

Need a hint?

Just create a variable named threshold and assign it the value 1e-30.

3

Find constants greater than the threshold

Create a new dictionary called filtered_constants that includes only the items from phys_constants where the value is greater than threshold. Use a dictionary comprehension with key and value as variables.

SciPy

import scipy.constants as const
phys_constants = {'speed_of_light': const.c, 'planck': const.h}
threshold = 1e-30
# Create filtered_constants dictionary with items where value > threshold
# Your code here

Need a hint?

Use a dictionary comprehension like {key: value for key, value in phys_constants.items() if value > threshold}.

4

Print the filtered constants

Print the filtered_constants dictionary.

SciPy

import scipy.constants as const
phys_constants = {'speed_of_light': const.c, 'planck': const.h}
threshold = 1e-30
filtered_constants = {key: value for key, value in phys_constants.items() if value > threshold}
# Print filtered_constants
# Your code here

Need a hint?

Use print(filtered_constants) to show the result.