Pre-U Physics - Optical Properties

What is Snell´s Law?

• $n_{\ }=\frac{c}{v}$

• $n_1\ ·\ \sin\left(\theta_1\right)\ =\ n_2\ ·\ \sin\left(\theta_2\right)$

• $\sin\left(\theta_c\right)\ =\frac{n_2}{n_1}$

• $n\lambda=d\sin\theta$

In reflection, the angle of ... is equal to the angle of reflection.

What are the two types of reflection?

• Refract & Absorb

• Total & Partial

• Real & Virtual

• Specular & Diffuse

What is Malus´ Law?

• $I\ =\ I_{0\ }\cos^2\left(\theta\right)$

• $n_1\sin\left(\theta_1\right)\ =\ n_2\ \sin\left(\theta_2\right)$

• $E=hf$

• $I\propto A^2$

When traveling into a less dense medium the angle to the normal ___ .

When light travels from air into a glass block, what feature of the light change?

• direction of travel, speed, frequency

• direction of travel, speed, wavelength

• frequency, speed, wavelength

• direction of travel, frequency, wavelength

A vertically polarised beam of light of intensity $I_0$  enters a polarising filter whose plane of polarisation is at  $45\degree$  to the vertical.

What is the intensity of the transmitted beam?

• zero
  

•  $\frac{I_0}{2}$  

•  $I_0$  

•  $I_0^2$