Reflection, Refraction and Diffraction

Question 1

When the size of the gap is much larger than the wavelength of the waves, is the diffraction large or small?

Answer 1

Small

Question 2

When the size of the wavelength is much smaller than the size of the gap, is the diffraction large or small?

Answer 2

Small

Question 3

Which part of the electromagnetic spectrum will diffract most around a mountain?

Answer 3

Radio waves

Question 4

Which will diffract least around a hill, short wavelength radio or long wavelength radio waves?

Answer 4

Short wavelength radio

Question 5

How does the angle of incidence compare to the angle of reflection?

Answer 5

Angle of incidence = Angle of reflection

Question 6

The angle of incidence is measured between which two lines?

Answer 6

Ray of incident light and the normal line

Question 7

When light travels from air to glass, the speed of light does what?

Answer 7

Slows down

Question 8

When light travels from air to glass, how does the angle of incidence compare to the angle of refraction?

Answer 8

Angle of refraction is less than the angle of incidence

Question 9

When light travels from glass to air, how does the angle of incidence compare to the angle of refraction?

Answer 9

Angle of incidence is less than the angle of refraction

Question 10

When white light refracts through a prism, which colour refracts the most?

Answer 10

Violet

Question 11

Name the colours of the spectrum starting with the longest wavelength colour.

Answer 11

Red, Orange, Yellow, Green, Blue, Indigo, Violet

Question 12

State what is meant by the term refraction.

Answer 12

The change in speed of light as it moves from one medium to another.