Physics 150 Final Exam Review Questions with
Correct Answers.
What is an alpha ray?
a stream of helium nuclei
what is a beta ray?
a stream of electrons
Which force holds the nucleus of an atom together?
Strong nuclear force
carbon dating involves
carbon-14
These cannot be deflected by electrical or magnetic means
Gamma rays
Continuously self-generating electric and magnetic field produce electromagnetic waves.
What is the angle between there two fields when they produce light as a resultant?
90 degrees
All electromagnetic waves are?
Transverse waves
All electromagnetic waves propagate at the speed of light in vacuum or free space. This has
a constant value: 3 x 10^8 m/s. This constant value of speed is necessary for?
, The stability of light, preserving energy conservation, preventing light from dying out.
The colors of different objects are due to different?
frequencies and wavelengths
Why lunar eclipses are seen by more people than solar eclipses?
Because the moon's shadow is much smaller than earth's shadow and when earth shadows the
moon, it is visible to all the people in the night side.
Consider a cinema scree and a projector. The scree should have?
Equal spread of roughness.
Why white light bends towards normal when incident upon a denser medium from a
lighter medium? (refraction)
Because white light is composed of other different colored lights and different colored lights
travel at different speeds in a particular medium
The blueness of the day-time sky is due mostly to light
scattering
A real image can be cast on a screen by a
converging lens
diffraction occurs when light passes a?
pinhole, narrow slit, wide slit, or sharp edge.
Correct Answers.
What is an alpha ray?
a stream of helium nuclei
what is a beta ray?
a stream of electrons
Which force holds the nucleus of an atom together?
Strong nuclear force
carbon dating involves
carbon-14
These cannot be deflected by electrical or magnetic means
Gamma rays
Continuously self-generating electric and magnetic field produce electromagnetic waves.
What is the angle between there two fields when they produce light as a resultant?
90 degrees
All electromagnetic waves are?
Transverse waves
All electromagnetic waves propagate at the speed of light in vacuum or free space. This has
a constant value: 3 x 10^8 m/s. This constant value of speed is necessary for?
, The stability of light, preserving energy conservation, preventing light from dying out.
The colors of different objects are due to different?
frequencies and wavelengths
Why lunar eclipses are seen by more people than solar eclipses?
Because the moon's shadow is much smaller than earth's shadow and when earth shadows the
moon, it is visible to all the people in the night side.
Consider a cinema scree and a projector. The scree should have?
Equal spread of roughness.
Why white light bends towards normal when incident upon a denser medium from a
lighter medium? (refraction)
Because white light is composed of other different colored lights and different colored lights
travel at different speeds in a particular medium
The blueness of the day-time sky is due mostly to light
scattering
A real image can be cast on a screen by a
converging lens
diffraction occurs when light passes a?
pinhole, narrow slit, wide slit, or sharp edge.
