Questions from Modern Physics

Q: What do you think would be different in everyday life if the

What do you think would be different in everyday life if the speed of light were 10 m/s instead of 3.00 * 108 m/s ?

Q: You are standing on a train platform watching a high-speed

You are standing on a train platform watching a high-speed train pass by. A light inside one of the train cars is turned on and then a little later it is turned off. a. Who can measure the proper tim...

Q: Repeat Exercise 34.41 using the same lenses except for the

Repeat Exercise 34.41 using the same lenses except for the following changes: a. The second lens is a diverging lens having a focal length of magnitude 60.0 cm. b. The first lens is a diverging lens...

Q: Two thin lenses with a focal length of magnitude 12.0

Two thin lenses with a focal length of magnitude 12.0 cm, the first diverging and the second converging, are located 9.00 cm apart. An object 2.50 mm tall is placed 20.0 cm to the left of the first (d...

Q: The crystalline lens of the human eye is a double-convex

The crystalline lens of the human eye is a double-convex lens made of material having an index of refraction of 1.44 (although this varies). Its focal length in air is about 8.0 mm, which also varies....

Q: The negative pion (π-) is an unstable particle with an

The negative pion (π-) is an unstable particle with an average lifetime of 2.60 * 10-8 s (measured in the rest frame of the pion). a. If the pion is made to travel at very high speed relative to a la...

Q: As you pilot your space utility vehicle at a constant speed toward

As you pilot your space utility vehicle at a constant speed toward the moon, a race pilot flies past you in her spaceracer at a constant speed of 0.800c relative to you. At the instant the spaceracer...

Q: A spacecraft flies away from the earth with a speed of 4

A spacecraft flies away from the earth with a speed of 4.80 * 106 m/s relative to the earth and then returns at the same speed. The spacecraft carries an atomic clock that has been carefully synchroni...

Q: An alien spacecraft is flying overhead at a great distance as you

An alien spacecraft is flying overhead at a great distance as you stand in your backyard. You see its searchlight blink on for 0.150 s. The first officer on the spacecraft measures that the searchligh...

Q: A camera lens has a focal length of 180.0 mm

A camera lens has a focal length of 180.0 mm and an aperture diameter of 16.36 mm. a. What is the ƒ-number of the lens? b. If the correct exposure of a certain scene is 1/30 s at f/11, what is the c...