Learn more about our help with Assignments: Optics
Search & Filtering
Optics
refraction is a measure of the................as wave passes from medium to another
Optics
does apparent depth of a tank of water change if viewed obliquely? if so does apparent depth increase or decrease?
Optics
A person stands 40 m from a flag pole. With a protractor at eye level, he finds the angle at the top of the flag pole with the horizontal is 25.0 degrees. How high is the flag pole? The distance from his feet to his eyes is 1.8 m.
Optics
Sky-light is partially plane polarized. why?
Optics
Using a 30,60&90 triangular glass prism of refractive index=1.5 draw the ray diagram if the ray is incident perpendicular on any side.
Optics
1. A glass rod (n=1.6) is immersed in oil (n=1.45) an object placed to the left on the rod's axis is to be imaged 1.20 m inside the rod. How far from the left end of the rod must the object be located to form the image?
2. Determine distance and height of the image formed when an object of height 20cm and a distance of 20cm is placed in front of a concave surface with n=1.45 (note: use n(air) 1.00029)?
2. Determine distance and height of the image formed when an object of height 20cm and a distance of 20cm is placed in front of a concave surface with n=1.45 (note: use n(air) 1.00029)?
Optics
determine the distance and height of the image formed when an object of height 20 cm is placed 20 cm in front of a concave surface with n=1.45
Optics
A semiconductor laser has a total current that comprises a bias current I(dc) and a small
signal ac current i(ac). The laser threshold current is I(th) = 50 mA. When I(dc) = 75 mA and
i(ac) = 0, the laser output power is P(output) = 2.5 mW.
By means of a sketch, show how you expect the ac component of the modulated
optical power to behave as the frequency of the driving current ω is increased but
its amplitude is maintained constant.
signal ac current i(ac). The laser threshold current is I(th) = 50 mA. When I(dc) = 75 mA and
i(ac) = 0, the laser output power is P(output) = 2.5 mW.
By means of a sketch, show how you expect the ac component of the modulated
optical power to behave as the frequency of the driving current ω is increased but
its amplitude is maintained constant.
Optics
Light is a form of energy that -------
is transported from place to place due to the temperature gradient
requires material media for its propagation
stimulates the sensation of sight
cannot be difrracted
is transported from place to place due to the temperature gradient
requires material media for its propagation
stimulates the sensation of sight
cannot be difrracted
Optics
Which of the following is NOT correct?
light is a longitudinal wave
light is a tranverse wave
light is an electromagnetic wave
light can exhibit the phenomenon of polarisation
light is a longitudinal wave
light is a tranverse wave
light is an electromagnetic wave
light can exhibit the phenomenon of polarisation
