Tag: physics

Quizzes (598) Questions (13441)

Questions Related to physics

Multiple choice physics spectra the electromagnetic spectrum electromagnetic spectrum electromagnetic waves

Electromagnetic waves exhibit the property of

  1. Reflection

  2. Refraction

  3. Total internal reflection

  4. Both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

EM waves exhibit the properties of reflection and refraction. In refraction, when an EM wave passes from one medium to the another, its direction to travel,speed and wavelength changes, but frequency remains unchanged.

Multiple choice physics spectra the electromagnetic spectrum electromagnetic spectrum electromagnetic waves

Which of the following are use of microwaves?

  1. They are used for satellite communication.

  2. They are used for analysis of atomic and molecular structure.

  3. They are used cooking in microwave ovens.

  4. All of the above.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Microwaves are used in the following applications:

1. Satellite communications
2. Radar communications
3. Analysis of atomic and molecular structure
4. Cooking in microwave ovens

Multiple choice physics spectra the electromagnetic spectrum electromagnetic spectrum electromagnetic waves

Identify the most notable difference between a ultraviolet wave and a light wave ?

  1. Speed

  2. Refractive index

  3. Reflectivity

  4. Amplitude

  5. Frequency
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Both , ultraviolet and light wave are electromagnetic waves , having the speed of light , but in electromagnetic frequency spectrum ultraviolet wave falls before light wave , in the decreasing order of frequency.It means frequency of UV waves is greater than light wave.