physics bowl Flashcards
What type of wave is used in microwave ovens?
Microwaves
What is the longest wavelength visible to the human eye?
700 nm (Red light)
What type of wave is light?
Electromagnetic wave / Transverse wave
What is the relationship between the frequency and wavelength of a wave?
As frequency increases, wavelength decreases.
Which scientist discovered the photoelectric effect?
Albert Einstein
What is the formula for calculating kinetic energy?
KE = ½ mv²
What type of electromagnetic wave has the highest frequency?
Gamma rays
What wave property is responsible for the color of light?
Wavelength
Which electromagnetic wave is used for Wi-Fi and Bluetooth?
Radio waves
What type of wave is sound?
Longitudinal wave
Which type of electromagnetic radiation has the longest wavelength?
Radio waves
What wave type is used for medical imaging to view bones inside the body?
X-rays
Which wave is used for television broadcasts?
Radio waves
What does the Doppler Effect describe?
The change in frequency or wavelength of a wave as the source or observer moves.
What is the SI unit for frequency?
Hertz (Hz)
What is the formula for Ohm’s Law?
V = IR (Voltage = Current × Resistance)
What is the effect of increasing temperature on the resistance of a metal wire?
The resistance increases as temperature increases.
What kind of wave is used to treat cancer with radiation therapy?
Gamma rays
What kind of wave is used for remote control signals?
Infrared waves
What does the Law of Reflection state?
The angle of incidence equals the angle of reflection.
What happens to the wavelength of light when it enters a denser medium?
The wavelength decreases.
What is the speed of light in a vacuum?
299,792,458 m/s
What type of wave is used for the transmission of television signals?
Radio waves
Which electromagnetic wave is used in night vision technology?
Infrared waves
What type of electromagnetic wave has a wavelength longer than visible light but shorter than radio waves?
Microwaves
What happens to the wavelength of a wave as its frequency increases?
The wavelength decreases.
What is the formula for calculating the energy of a photon?
E = hf
What is the type of wave that causes seismic waves?
Mechanical waves (both longitudinal and transverse)
What is the relationship between the wavelength and frequency of electromagnetic waves in a vacuum?
c = λf (speed of light = wavelength × frequency)
What type of wave does not require a medium to travel?
Electromagnetic waves (e.g., light)
What is the principle that states that energy is neither created nor destroyed?
Law of Conservation of Energy
What happens to the frequency of a wave when the source of the wave moves away from the observer?
The frequency decreases (Doppler Effect)
What kind of radiation causes sunburn?
Ultraviolet radiation (UV)
Which wave has the highest energy among the electromagnetic spectrum?
Gamma rays
What phenomenon explains why the sky appears blue?
Rayleigh scattering
What is the principle that explains the bending of light at a boundary between two media?
Refraction
What does the formula v = λf represent?
Wave speed = wavelength × frequency
What kind of wave is used in dental X-rays?
X-rays
What is the wave property responsible for diffraction?
Wavelength
What is the formula for calculating the force exerted by an object?
F = ma (Force = mass × acceleration)
What is the phenomenon where a wave changes direction as it passes through an opening or around an obstacle?
Diffraction
The temperature of an object is the measure of :
The average energy of the particles
