An exhibition designer is testing a decorative acrylic block for a light installation.
Why is using a broad, thick beam of light less likely to give accurate refraction measurements than using a highly narrowed beam?
For a specific angle of incidence, the designer measures the angle of refraction three times. The measurements are: 19∘,24∘,23∘19^\circ, \quad 24^\circ, \quad 23^\circ19∘,24∘,23∘ Calculate the mean angle of refraction.
The designer places a blue filter in front of a white spotlight so that only blue light passes through. Complete the following sentence: "When white light is incident on the blue filter, all colours of the visible spectrum except for blue are ___________ by the filter."
Write down the equation which links wave speed (vvv), frequency (fff), and wavelength (λ\lambdaλ).
The speed of light in air is 3.0×108 m/s3.0 \times 10^8 \text{ m/s}3.0×108 m/s. The frequency of this blue light is 6.25×1014 Hz6.25 \times 10^{14} \text{ Hz}6.25×1014 Hz. Calculate the wavelength of this blue light in air.