Explanation

• Electrons exhibit diffraction effects because their de Broglie wavelength is similar to the spacing between atomic layers in a crystal.
• The de Broglie wavelength of an electron is given by λ = h/p, where h is Planck's constant and p is the electron's momentum.
• For electrons in a crystal, this wavelength is typically in the range of 0.1-1 nanometers, which is similar to the spacing between atomic layers in the crystal.
• As a result, electrons interact with the crystal lattice and exhibit diffraction effects, such as bending around corners or passing through the crystal in specific directions.

Explanation

The phenomenon where light of suitable frequency falling on a metal surface ejects electrons is called the "photoelectric effect."

Explanation

Length is a base quantity in the International System of Units (SI), with the unit meter (m).

Volume and Area are derived quantities, calculated using base quantities like length.

Explanation

Volume of a sphere (or similar 3D object):

V= 4/3​πr^3

• So, volume depends on the cube of the radius.

• Percentage error in volume = 3 × (percentage error in radius)

$$\text{Error in volume}=3\times 1\%=3\%$$

Explanation

The least distance of distinct vision for a normal human eye is 25 cm.

It is the minimum distance at which the eye can see an object clearly without strain.

Explanation

To find which body has the largest kinetic energy, we use the formula for kinetic energy:

Mass = 2M, Speed = 3V

$$$$K.E.d=12⋅2M⋅(3V)2

$$$$
=12⋅2M⋅9V2

$$text{K.E.}_d = frac{1}{2} cdot 2M cdot (3V)^2 = frac{1}{2} cdot 2M cdot 9V^2 = 9MV^2$$K.E.d​=1​/2⋅2M⋅(3V)^2=1/2​⋅2M⋅9V^2=9MV^2

Explanation

Explanation

Since the two boxes are identical, the weight of the second box is equal to the weight of the first box. 

The normal force from the table will increase to support the combined weight of both boxes, which is 150 N (2 x 75 N).

Explanation

Jupiter has the shortest day in the solar system.

It completing one rotation in approximately 9 hours and 56 minutes.

Jupiter is also the fastest spinning planet in the solar system.

Explanation

The transmission line feeding power on either side of the main transmission line is called Secondary transmission.