quiz1-practice

DRAFT y +1/3/58+ y Question 12 Consider light of wavelength λ = 500 nm impinging on a double-slit with slit spacing of s = 5 μ m . What would be the value of sin θ for observation angle θ at the 2 nd -order maximum? Recall the formula for the path difference Δ d = s × sin θ . sin θ = 0 . 02 sin θ = 0 . 1 sin θ = 0 . 2 sin θ = 0 . 01 Question 13 Which statement is true? In circularly polarized light, E x is shifted relative to E y by λ/ 2 In circularly polarized light, E x is shifted relative to E y by λ/ 4 In circularly polarized light, E x is shifted relative to E y by λ In circularly polarized light, E x is shifted relative to E y by λ/ 8 Question 14 What length of antenna would you need to get the best reception for microwaves at a frequency of f = 10 GHz ? (You may need the formula λ = c/f and the speed of light c = 3 × 10 8 m / s ). 30 cm 3 cm 1.5 cm 15 cm Question 15 Which of the following has dimensions of energy?) years × kWh/d Newtons Joules/s kWh/d Question 16 Which of the following phenomena helps explain why the formation of supercon- tinents might coincide with the creation of “snowball Earth” phases? Methane is a stronger greenhouse gas than CO 2 . The formation of the ozone layer. Photosynthesis. Chemical weathering. Question 17 Which of the following gives the typical power consumption of a 40 W lightbulb (if it’s always left on)? 101 kWh/d 1 kWh/d 2 kWh/d 0.1 kWh/d y For your examination, preferably print documents compiled from auto-multiple-choice. y