P5.3.3 - Light and colour Flashcards
1
Q
Do thicker lenses have shorter or longer focal lengths?
A
Shorter focal lengths
2
Q
What does shorter focal length mean in terms for light?
A
It means light
- converges more for convex lenses
- diverges more for concave lenses
3
Q
What is dispersion?
A
The splitting of white light into its constituent wavelengths (spectrum)
4
Q
The smaller the wavelength…
A
The more the refraction
5
Q
Does blue light refract more than red light?
A
Yes
6
Q
What is the different between specular reflection and diffuse scattering?
A
- Specular reflection produces sharp images
- Diffuse scattering produced no images
7
Q
Explain why some clouds appear whit,e but some appear dark.
A
- White clouds scatter all/most wavelengths of light
- Dark clouds absorb most wavelengths of light
