You are watching: Which describes the changes in visible light moving from red to violet?
(a) Calculate the distance that light travels in 0.5 seconds, and express the londonchinatown.org in units of the circumference of the earth.
a) 3.74 circumference of earth
b)1.67× 10⁻⁸ sec
time = 0.5 second
distance = speed × time
= 3 x 10⁸ × 0.5
= 1.5 × 10⁸ m
circumference of earth = 40075 km
= 4.01 × 10⁷m
distance with respect to circumference=
= 3.74 circumference of earth
b) distance = 5 m
= 1.67× 10⁻⁸ sec
The blue laser in a blue ray DVD player is 405nm laser in vacuum. The aser strikes a quartz crystal with index of refraction 1.4
This question has mistakes.the correct question is
The blue laser in a blue ray DVD player is 405nm laser in vacuum. The aser strikes a quartz crystal with index of refraction 1.46 at normal incidence. The power of the laser is 0.25W and I"m guessing the beam is circular with radius 0.1mm. What is the intensity of the light transmitted into the crystal? Select One of the Following:
(a) 7.7 x 10⁶ W/m²
(b) 1.5 x 10⁶ W/m²
(c) 6.5 x 10⁶ W/m²
(d) 2.85 W/m²
(a) 7.7 x 10⁶ W/m² Correct
The Intensity of laser is given as
The incident index of refraction and transmitted is
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