Explanation

The energy of a photon is calculated using the formula E = hf, where:

• h = Planck’s constant
• f = frequency of the photon

This shows that photon energy is directly proportional to its frequency.

Last verified on 23-05-2026

Explanation

• When frequency is above the threshold, electrons are emitted from the metal surface.
• Increasing intensity means more photons fall on the surface, so more electrons are emitted.

Last verified on 23-05-2026

Explanation

• Highest tides are called Spring tides.
• They occur when the Sun, Earth, and Moon are aligned in a straight line.
• Their gravitational forces combine and produce very high and very low tides.

Last verified on 23-05-2026

Explanation

• Newton's Second Law of motion explains the relationship between force, mass, and acceleration
• Through the equation F = ma, which states that the acceleration of an object
• It is directly proportional to the net force acting on it and inversely proportional to its mass.
• This means a greater force produces greater acceleration,
• While a greater mass results in less acceleration for the same force.

Last verified on 22-05-2026

Explanation

• Beta radiation consists of high-speed electrons emitted from the nucleus.
• These are produced during beta decay of unstable atoms.
• They are more penetrating than alpha but less than gamma radiation.
• Beta radiation can be stopped by thin metal sheets (like aluminum).

Last verified on 06-05-2026