REFERENCE: https://drive.google.com/file/d/1MdBsPSii-8YR5miMVK9ISogvqRFD0NRN/view?usp=sharing

please answer all items. i will give a high rate. with SOLUTIONS PLEASE.

1. What principle is responsible for alternating light and dark bands when light passes through two or more narrow slits? a. dispersion b. interference c. polarization d. re'aclion 2. When do we consider two light sources to be coherent? They are of the same a. frequency only b. frequency and amplitude c. frequency and maintain constant phase difference d. amplitude and maintain constant phase difference 3. What is meant when two light rays strilte a screen and are in phase with each other? a. They have the same wavelength. b. They are travelling at the same speed. c. They altemately reinforce and cancel each other. d. When the electric eld because of one is a maximum. the electric eld due to the other is also a maximum, and this relation is maintained as time passes. 4. How do we describe light from each opening at the rst maxima in a double-slit experiment as they arrive? The light from each opening antves a. in phase c. 180\" out of phase b. 90" out of phase d. crest to trough with each other 5. In Young's double slit experiment. if the separation between the slits decreases, what happens to the distance between the interference fringes? a. It increases. c. It remains the same. b. It decreases. d. There is not enough information. 6. Which of the following describes the mass of an atom? The mass of an atom is a. concentrated in the nucleus b. concentrated in the cloud of electrons surrounding the nucleus c. evenly divided between the nucleus and the surrounding electron cloud d. approximately equally divided between neutrons, protons, and electrons T. What happens to the half-life of a radioactive substance as it decays? It a. increases c. remains constant b. decreases d. could be any of these 8. Which of the following is TRUE of the energy level as the distance from the nucleus increases? The energy level . a. increases c. remains constant b. decreases d. could be any of these El. Which is NOT an implication of electrons jumping from one energy level to another? a. Electrons gain or lose energy. b. The atom will remain in its ground state. c. Electrons absorb or emit electromagnetic radiation. d. Jumping of electrons is the main reason for radiation to occur. 1t]. Which is NOT TRUE about the half-life of substances? A substance with half life . a. long; is stable c. short; is very radioactive b. long; poses no problem d. short; decoys immediately 11. Which postulate in Einstein's special theory of relativity states that the law of physics must be the same in all inertial frames of reference? a. principle of relativity c. principle of time dilation b. superposition principle d. constancy of the speed of light 12. You are tiding in a spaceship that has no windows, radios, or other means for you to observe or measure what is outside. You wish to determine if the ship has stopped or has moved at constant velocity. What should you do? You can determine if the ship has moved by . a. determining the absolute velocity of light b. determining the apparent velocity of light c. checking your precision time piece if it is running d. giving up because you have taken on an impossible taslt 13. Relative to a stationary observer. how will one describe a moving clock? The clock will a. keep its normal time c. always run slower than normal b. always mn faster than normal d. depend on the relative velocity 14. Suppose one twin takes a ride in a spaceship travelling at a very high speed to a distant star and back again. while the other twin remains on Earth. What will be our prediction of the age of the travelling twin brother compared to the one who is on Earth? He will be a. older c. of the same age b. young er d. cannot be determined 15. An object moves in a direction parallel to its length with a velocity that approaches the velocity of light. What will be its width as measured by a stationary observer? The width a. does not change c. increases slightly b. approaches zero d. approaches innity