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All 9 questions. After you submit, each question shows the right answer and why. Back to the quick check
A ray of light hits a flat mirror at 40° to the normal. At what angle to the normal does it bounce off?
Light travels more slowly through water than through empty space.
Which colour of visible light has the lowest frequency?
Light passes from air into glass at an angle. What happens to its direction?
Using c = 3.00 × 10⁸ m/s, what is the speed of light in diamond (n = 2.419), in units of 10⁸ m/s, to two decimal places?
A ray travels from air (n = 1.00) into water (n = 1.333) at 30° to the normal. What is the angle of refraction in degrees, to one decimal place?
What is the critical angle, in degrees to one decimal place, for light travelling inside crown glass (n = 1.52) towards air (n = 1.00)?
Taking h = 6.626 × 10⁻³⁴ J s and c = 3.00 × 10⁸ m/s, what is the energy of one photon of green light with wavelength 550 nm, in units of 10⁻¹⁹ J, to two decimal places?
Using Snell's law, show why total internal reflection can occur for light going from water into air but never for light going from air into water.
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