The human eye is most sensitive to ____. blue light green light red light all visible...
The human eye is most sensitive to ____.
|
blue light |
||
|
green light |
||
|
red light |
||
|
all visible light equally |
1.
The wavelength corresponding to light with a frequency of 4 × 10 14 Hz is ____.
|
1.33 m |
||
|
0.075 mm |
||
|
7500 nm |
||
|
750 nm |
2.
Violet light has a wavelength of about ____.
|
0.4 micrometers |
||
|
500 nm |
||
|
700 nm |
||
|
0.2 mm |
3.
A 200-cd lamp is 4 m directly above a surface. The illumination is approximately ____.
|
12.5 lm/m2 |
||
|
25 lm/m2 |
||
|
50 lm/m2 |
||
|
80 lm/m2 |
Homework Answers
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The human eye is most sensitive to ____.
blue light
green light
red light
all visible...
The human eye is sensitive to light with wavelength down to 710 nm. What is the...
The human eye is sensitive to light with wavelength down to 710 nm. What is the frequency of radiation at this wavelength? (1 nm = 10−9 m and c = 3.00 × 108 m/s) 2.18 e+7 Hz 4.37E+7 Hz 4.42E+6 Hz 4.23E+5 Hz 4.23E+14 Hz
The human eye is most sensitive to green light of wavelength 505 nm . Experiments have...
The human eye is most sensitive to green light of wavelength 505 nm . Experiments have found that when people are kept in a dark room until their eyes adapt to the darkness, a single photon of green light will trigger receptor cells in the rods of the retina.1.What is the frequency of this photon?2.How much energy (in joules and eV ) does it deliver to the receptor cells?Answer in the order indicated. Separate your answers with a comma.3.To appreciate...
White light is made of all colours of the visible spectrum which has a wavelength range...
White light is made of all colours of the visible spectrum which
has a wavelength range of approximately 380 – 750 nm (violet to
red). White light is incident on a diffraction grating that has 90
lines/mm. What is the width of the 1st order rainbow
band that appears in the diffraction pattern if the screen is 1.60
m away? Express your answer in mm and round to 2 decimal
places.
Question 7 (2 points) White light is made of...
The human eye is most sensitive to light in the yellow-green region of the electromagnetic spectrum...
The human eye is most sensitive to light in the yellow-green region of the electromagnetic spectrum (frequency of 550 THz). What is the energy of one yellow-green photon? Use h = 4.14×10−15 eV⋅s?
Human night vision is very sensitive to blue light but is relatively unaffected by red light....
Human night vision is very sensitive to blue light but is relatively unaffected by red light. (For this reason, many flashlights intended for use while camping or hiking have a red light setting which won’t affect your ability to see in the darkness of night.) You wish to design a reflective sign which will be visible at night, but not harm the viewer’s night vision. The sign will have a white reflective backing and will be coated by polycarbonate with...
1. Rank the following colors of visible light according to increasing energy: Red, Green, Blue. In...
1. Rank the following colors of visible light according to increasing energy: Red, Green, Blue. In other words, the color of light that is lowest energy is listed first, and the color of light that is highest in energy is listed last. 2. The most intense line in the emission spectrum for sodium appears at a wavelength of 589 nm. What color would you expect to observe when a solution that contains sodium ions is heated strongly in the flame...
2. Human night vision is very sensitive to blue light but is relatively unaffected by red...
2. Human night vision is very sensitive to blue light but is relatively unaffected by red light. (For this reason, many flashlights intended for use while camping or hiking have a red light setting which won't affect your ability to see in the darkness of night.) You wish to design a reflective sign which will be visible at night, but not harm the viewer's night vision. The sign will have a white reflective backing and will be coated by polycarbonate...
2. Human night vision is very sensitive to blue light but is relatively unaffected by red...
2. Human night vision is very sensitive to blue light but is relatively unaffected by red light. (For this reason, many flashlights intended for use while camping or hiking have a red light setting which won’t affect your ability to see in the darkness of night.) You wish to design a reflective sign which will be visible at night, but not harm the viewer’s night vision. The sign will have a white reflective backing and will be coated by polycarbonate...
White light is made of all colours of the visible spectrum which has a wavelength range...
White light is made of all colours of the visible spectrum which has a wavelength range of approximately 380 - 750 nm (violet to red). White light is incident on a diffraction grating that has 110 lines/mm. What is the width of the 1st order rainbow band that appears in the diffraction pattern if the screen is 1.50 m away? Express your answer in mm and round to 2 decimal places. Your Answer: Answer
The photoreceptors in the human eye, called rods and cones, have different sensitivities to different wavelengths...
The photoreceptors in the human eye, called rods and cones, have different sensitivities to different wavelengths of electromagnetic waves. (Figure 1) (Notice that the y axis in the figure is a logarithmic scale.) The rods, which number over 100 million, can only be activated by a certain range of wavelengths, but they do not pass any color information to the brain. In other words, they note differences in shades of grey (from black to white) and are responsible for a...
White light is made of all colours of the visible spectrum which
has a wavelength range of approximately 380 – 750 nm (violet to
red). White light is incident on a diffraction grating that has 90
lines/mm. What is the width of the 1st order rainbow
band that appears in the diffraction pattern if the screen is 1.60
m away? Express your answer in mm and round to 2 decimal
places.
Question 7 (2 points) White light is made of...
1. Rank the following colors of visible light according to increasing energy: Red, Green, Blue. In other words, the color of light that is lowest energy is listed first, and the color of light that is highest in energy is listed last. 2. The most intense line in the emission spectrum for sodium appears at a wavelength of 589 nm. What color would you expect to observe when a solution that contains sodium ions is heated strongly in the flame...
2. Human night vision is very sensitive to blue light but is relatively unaffected by red light. (For this reason, many flashlights intended for use while camping or hiking have a red light setting which won't affect your ability to see in the darkness of night.) You wish to design a reflective sign which will be visible at night, but not harm the viewer's night vision. The sign will have a white reflective backing and will be coated by polycarbonate...
White light is made of all colours of the visible spectrum which has a wavelength range of approximately 380 - 750 nm (violet to red). White light is incident on a diffraction grating that has 110 lines/mm. What is the width of the 1st order rainbow band that appears in the diffraction pattern if the screen is 1.50 m away? Express your answer in mm and round to 2 decimal places. Your Answer: Answer
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