Photoelectric Effect & Electromagnetic Spectrum

Front

What is the photoelectric effect?

Back

The photoelectric effect is the phenomenon where electrons are emitted from a material (usually a metal) when it is exposed to light of sufficient frequency.

Front

What is the minimum frequency required for the photoelectric effect to occur?

Back

The minimum frequency required for the photoelectric effect to occur is known as the threshold frequency.

Front

What is the electromagnetic spectrum?

Back

The electromagnetic spectrum is the range of all types of electromagnetic radiation, including radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.

Front

Which part of the electromagnetic spectrum is visible to the human eye?

Back

The visible light spectrum is the part of the electromagnetic spectrum that is visible to the human eye.

Front

What is the relationship between frequency and wavelength in electromagnetic waves?

Back

Frequency and wavelength are inversely related; as the frequency increases, the wavelength decreases, and vice versa.

Front

What is amplitude in the context of waves?

Back

Amplitude is the height of a wave from its rest position to its crest or trough, indicating the energy of the wave.

Front

What is the SI unit of frequency?

Back

The SI unit of frequency is hertz (Hz), which is defined as one cycle per second.

Front

How does light behave as both a particle and a wave?

Back

Light exhibits wave-like properties (such as interference and diffraction) and particle-like properties (such as quantization in the form of photons), a concept known as wave-particle duality.

Front

What is the speed of light in a vacuum?

Back

The speed of light in a vacuum is approximately 3.00 x 10^8 meters per second.

Front

What is the formula for calculating the energy of a photon?

Back

The energy of a photon can be calculated using the formula E = hf, where E is energy, h is Planck's constant (6.626 x 10^-34 J·s), and f is frequency.