QUESTION 6

Which of the following confirms particle nature of light?

Davison and Germer experiment

photoelectric effect

Rutherford's alpha scattering experiment

interference of light

QUESTION 10

Which of the following equations is used to calculate the energy released in the nuclear fission process?

QUESTION 12

Which of the following is true for the transition of electrons from a higher energy to a lower energy state?

The greater the energy difference between the levels, the more is the wavelength of the photons emitted.

The greater the energy difference between the levels, the less is the wavelength of the photons emitted.

The greater the energy difference between the levels, the less is the frequency of the photons emitted.

The energy difference is not related to frequency or wavelength of the photons emitted.

QUESTION 13 Which of the following is true for matter waves?

QUESTION 18 Which of the following is the correct statement?

A photon of yellow light has more energy than a photon of ultraviolet light.

A photon of yellow light has less energy than a photon of ultraviolet light.

A photon of yellow light has less energy than a photon of red light.

A photon of blue light has more energy than a photon of ultraviolet light.

SHORT ANSWER:

Explain the concept of frames of reference.

Explain length and time dilation and give an example of when each is observed.

A train is moving with a speed of 50 miles per hour. A man standing in the rear of a train car throws a ball toward the front of the train with a speed of 10 miles per hour. If a stationary observer outside the train sees this happen, what speed is the ball moving with? Explain your answer.

Explain any one situation in which light behaves like a particle and one situation in which light behaves like a wave.