Waves

Question 1

frequency =

Answer 1

1/time period

Question 2

period

Answer 2

time taken for one complete pattern of oscillation

Question 3

wavelength

Answer 3

distance between two successive identical points on the same wave pattern.

Question 4

frequency

Answer 4

number of oscillations per unit time

Question 5

Amplitude

Answer 5

the maximum displacement

Question 6

refraction

Answer 6

when wave moves from material to another.

Speed and diection will change.

Question 7

plane polarised wave

Answer 7

oscillations of the field and direction of travel are confined to a single plane.

Question 8

malus law

Answer 8

I=Imaxxcos^2theta

Question 9

refraction of light

Answer 9

n=c/v

Question 10

snells law

Answer 10

n1xsinθ1=n2xsinθ2

Question 11

total internal reflection

Answer 11

When there is both reflection and refraction.

Question 12

Critical angle

Answer 12

angle at which there is refraction perpendicular to the normal and very little bit of diffraction

Question 13

critical angle formula

Answer 13

sin C = 1/n1

Question 14

Youngs double-slit formula

Answer 14

λ=(ax)/D

Question 15

diffraction grating formula

Answer 15

nλ=dsinθ

Question 16

how are stationary waves formed

Answer 16

by two overlapping waves traveling in opposite directions.

Question 17

node

Answer 17

points on a stationary wave where displacement is zero

Question 18

antinode

Answer 18

points on a stationary wave where displacement is maximum

Question 19

fundamental mode

Answer 19

length of the string is half the wavelength of the note. It is the lowest frequency.

Question 20

stationary waves in closed tubes

Answer 20

Node is formed on the closed end and antinode on the open end

Question 21

stationary waves in an open tube

Answer 21

antinode on both open ends.