10_Phys Final Part 3

Last updated almost 6 years ago

15 questions

Note from the author:

Physics

Library

10_Phys Final Part 3

Last updated almost 6 years ago

15 questions

Note from the author:

Physics

Question 1

Snell's law is

when the sines of the incident and refractive angles are proportional (constant)

when the sines of the incident angle is proportional (constant)

when the sine of second angle is equal to the refractive index of the second

when the sine of first angle is equal to the refractive index of the second

Question 2

Is the line that is perpendicular to the separation of the 2 media.

Boundary line

Normal Line

Incident angle line

refractive angle line

Question 3

Speed of light is the

speed of electromagnetic wave in a light medium.

speed of electromagnetic wave in vacuum.

speed of electromagnetic wave in air.

Question 4

We see objects because ...

light is hitting on them without bouncing off.

objects capture their own light and gets to our eyes.

all the objects are non-luminous 

non-luminous objects reflect light and gets to our eyes.

Question 5

Electromagnetic Spectrum is ...

A full range of all electromagnetic waves and their effects/applications

A full range of all electromagnetic waves and their origins

A full range of all electromagnetic waves and their limitations

Question 6

Optical fibres are ...

Long, thin strands of glasses carrying digital signals in the form of pulses light emitted by an LED (light-emitting diode)

Long, thin strands of glasses carrying electrical signals in the form of pulses light emitted by an LED (light-emitting diode)

Question 7

Longitudinal waves ...

Carry the energy backwards and forwards related to the wave propagation

Carry the energy backwards and upwards related to the wave propagation

Carry the energy perpendicular to the wave propagation

Question 8

Difference of Frequency and Hertz (frequency unit) is

one is waves per unit time and the other is waves in one second.

one is waves per unit time and the other is 1 wave per unit time

one is waves per unit time and the other is waves in one meter.

one is waves per unit time and the other is 1 wave per distance time

Question 9

Refraction of any wave is ...

just when any object slows down

just when any wave slows down and changes its velocity

When incident angle is reflected completely

When incident angle slows down

Question 10

10.

Sound waves are caused by vibrations, are longitudinal waves, need a material to travel through, can be diffracted, etc. These are some of the ...

nature of ocean waves

nature of longitudinal waves

nature of sound waves

Question 11

11.

Scanning the womb of a pregnant woman is one of the applications of:

reflection of sounds with frequency higher than 20,000 Hz

reflection of sounds with frequency lower than 20,000 Hz

Reflection of transverse waves

Diffraction of the sound

Question 12

12.

Photons are ...

energized particles that only makes the visible light waves.

energized particles that makes the electromagnetic waves.

energized particles that only makes the gamma rays.

energized particles that makes the longitudinal waves.

Question 13

13.

If we say that an Electromagnetic wave has high frequency means ...

their amplitude is larger

their wavelength is small

have greater distance between crest to crest.

Question 14

14.

According to this picture:

In a smaller gap, there is no much diffraction

in a samller gap, the wavelength decreases

in a smaller gap, the wavelength increases

in a smaller gap, there is a lot of diffraction.

Question 15

15.

This picture is an example of:

reflection of sound

diffraction of sound

refraction of sound