Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
13 Cards in this Set
- Front
- Back
|
When was the first telescope invented |
At the end of the 16th century
|
|
|
How do you find the focal length of a converging lens
|
By focusing a distant object onto a piece of paper and measuring the distance between the lens and the paper
|
|
|
What is the focal point
|
The point where all the rays of light meet |
|
|
How does a refracting telescope work
|
|
|
|
How does a reflecting telescope work
|
|
|
|
2 facts about electromagnetic waves
|
They are transverse
They do not need a medium to travel |
|
|
Are sound waves longitudinal or transverse
|
Longitudinal
|
|
|
What is the wave speed equation
|
Wave speed (m/s) =distance (m)
Time (s) |
|
|
When was the first reflecting telescope made and by who
|
By sir Isaac Newton in 1668
|
|
|
what is the second wavespeed equation |
wavespeed(m/s) = frequency x wavelength |
|
|
Who discovered infrared radiation and how? |
William Herschel split a light ray into a spectrum using a prism and put a thermometer at each end of the spectrum . As the colour changed from violet to red the temperature rose |
|
|
When was the first reflecting telescope made and by who
|
By sir Isaac Newton in 1668
|
|
|
When was the first reflecting telescope made and by who
|
By sir Isaac Newton in 1668
|
