<span> A wavelenght is the distance between successive crests of a wave, especially points in a sound wave or electromagnetic wave.
</span>The diode laser operates at a wavelength<span> of 410 nm.</span>
Answer: YES
They always move towards the earth or any metallic conductor
Explanation:
Electric discharge between two objects follows a predictable path? YES
Static electricity is a buildup of electric charges on objects. Charges build up when negative electrons are transferred from one object to another. The object that gives up electrons becomes positively charged, and the object that accepts the electrons becomes negatively charged.
Once an object becomes electrically charged, it is likely to remain charged until it touches another object or at least comes very close to another object. That’s because electric charges cannot travel easily through air, especially if the air is dry.
They always move towards the earth or any metallic conductor
Answer: It is smaller than the second star
Explanation: The brightness of a star depends on two factors: The distance from the Earth and size of the star. More the distance from the Earth, the star appears dimmer. And bigger the star, brighter it is.

Where L is the luminosity,d is the distance
Luminosity depends on the surface area of star 
Here, it is given that the two stars are at the same distance from the Earth. The first star is dimmer. We can conclude from this that first star star must be smaller than the second star.
Answer:
Potential energy is stored energy in a state of readiness.
Explanation: