Review Questions Flashcards
(30 cards)
The speed of light in air is 3 x 10 ^9 meters/sec.
True or False
False
Which is not true about Corpuscular Theory?
A. It was postulated by Isaac Newton.
B. The corpuscles travel in straight line at high velocity.
C. Wavelength of corpuscles accounts for the different colors of white light.
D. The sensation of vision occurs when corpuscles enter the eyes
C. Wavelength of corpuscles accounts for the different colors of white light.
Light travels slower in water compared to window glass.
True or False
False
Interference and dispersion can be best explained in
A. geometrical optics
B. physical optics
C. quantum optics
D. visual optics
B. physical optics
This branch of optics deals with how images are formed in mirrors.
A. wave optics
B. quantum optics
C. physiological optics
D. none of the choices
D. none of the choices
Which is true about undulatory theory?
A. It was postulated by Maxwell.
B. Light is propagated through ethyl.
C. Different colors of white light is due to different wavelengths.
D. The velocity of light is not uniform in a medium.
C. Different colors of white light is due to different wavelengths.
Which of the following is NOT an ionizing radiation?
A. white light
B. UV
C. gamma
D. x-ray
A. white light
The speed of light in water is 2.25 x 10 ^5 km/sec.
True or False
True
Foucault was the the first man to measure the speed of light through land experiment.
True or False
False
Light travels the slowest in diamond. The denser the material is, the faster the light wave will move through the material.
True or False
False
The wavelength of yellow light is
A. 570-590 nm
B. 490-570 nm
C. 450-490 nm
D. 590-630 nm
A. 570-590 nm
What is the speed of light in water expressed in m/sec?
A. 140,000
B. 224,000
C. 200,000
D. none of the choices
D. none of the choices
Light travels from water to diamond. The speed of light ________ upon entering diamond.
A. decreases
B. increases
C. remains the same
A. decreases
We see things around us because of
A. reflection
B. refraction
C. absorption
D. dispersion
A. reflection
The blue-violet part of the blue light is a natural form that helps to regulate the body’s sleep and wake cycles, also known as your circadian rhythm.
True or False
False
The following are man-made sources of blue light except
A. digital screens
B. bioluminescent
C. LED and fluorescent lighting
D. arc lamps
B. bioluminescent
Refraction can take place in transparent, translucent or opaque materials.
True or False
False
Over exposure to blue-turquoise may increase the risk of cataract and ARMD.
True or False
False
Infrared has greater energy than gamma rays.
True or False
False
The longer is the wavelength of light, the lesser is the energy.
True or False
False
Violet, blue, green, yellow, orange, red are components of visible light arranged from high frequency to low frequency.
True or False
True
Light travelling from air to water will suffer refraction.
True or False
True
The wavelength of ultraviolet is longer than 760 nm.
True or False
False
Prism is capable of splitting white light into its component colors. The phenomenon is known as
A. dispersion
B. diffraction
C. refraction
D. interference
A. dispersion
