Physics Reviewer
Waves and Light
The term for any wave that hits a surface and bounces off is _____.
Reflection
The principle which allows a rainbow to form is ____.
Dispersion
When light interacts with matter, photons can be:
Neither created nor destroyed, only absorbed.
Energy of photons depends on ____.
Frequency of photons
Light is made up of:
Photons
What happens to a photon's energy as a wave's frequency rises?
Energy increases
Among the following particles, which one will have the largest wavelength if all have the same kinetic energy?
Alpha particle
What principle is responsible for light spreading as it passes through a narrow slit?
Diffraction
The principle which allows a rainbow form is
Dispersion
Which of the following can make a parallel beam of light when light from a point source is incident on it?
Two plane mirrors placed at 90 degrees to each other
Under which of the following conditions can a concave mirror form an image larger than the actual object?
When the object is placed between the focus and center of curvature.
The laws of reflection hold good for:
All mirrors irrespective of their shape
A magnifying glass uses what phenomenon to create a magnified image?
Refraction
A full-length image of a distant tall building can definitely be seen using:
A plane mirror
In torches, searchlights, and headlights of vehicles, the bulb is placed:
Very near to the focus of the reflector.
Headlights on a car appear brighter than taillights because:
Headlights use a different type of bulb.
A child standing in front of a magic mirror finds the image of her head bigger, the middle portion of her body of the same size, and her legs smaller. The order of combinations for the magic mirror from the top is:
Concave, plane, and convex
Electromagnetic Waves
Heinrich Hertz is a famous physicist mostly known for his discovery of what?
Electromagnetic Radiation
Which type of electromagnetic waves did Hertz produce in his laboratory that would shock the physics communication world?
Radio Waves
Which of the following shows the conflict between Newtonian mechanics and Maxwell’s electromagnetic theory?
Maxwell’s electromagnetic theory tells that the speed of light is constant.
Newtonian mechanics tells that the speed of light depends on the speed of the observer.
I and II only
Einstein's theory of special relativity is based on what postulates?
The laws of physics are the same in all inertial frames of reference moving with constant velocity relative to one another.
The speed of light is constant in all inertial frames of reference.
I and III
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