I 2.3: Interpreting results

Predict from the equation whether the value of $mr$ found experimentally will be larger, the same or smaller than the value of $mr$ calculated directly.

Predict from the equation whether the value of $mr$ found experimentally will be larger, the same or smaller than the value of $mr$ calculated directly.

A group of students perform an experiment to find the refractive index of a glass block. They measure various values of the angle of incidence i and angle of refraction r for a ray entering the glass from air. They plot a graph of the sin r against sin i.

They determine the gradient of the graph to be m.

Which of the following gives the critical angle of the glass?

A.  sin⁻¹(m)

B.  sin⁻¹$\left(\frac{1}{m}\right)$

C.  m

D.  $\frac{1}{m}$

A group of students perform an experiment to find the refractive index of a glass block. They measure various values of the angle of incidence i and angle of refraction r for a ray entering the glass from air. They plot a graph of the sin r against sin i.

They determine the gradient of the graph to be m.

Which of the following gives the critical angle of the glass?

A.  sin⁻¹(m)

B.  sin⁻¹$\left(\frac{1}{m}\right)$

C.  m

D.  $\frac{1}{m}$

A group of students perform an experiment to find the refractive index of a glass block. They measure various values of the angle of incidence i and angle of refraction r for a ray entering the glass from air. They plot a graph of the sin r against sin i.

They determine the gradient of the graph to be m.

Which of the following gives the critical angle of the glass?

A.  sin⁻¹(m)

B.  sin⁻¹$\left(\frac{1}{m}\right)$

C.  m

D.  $\frac{1}{m}$

A group of students perform an experiment to find the refractive index of a glass block. They measure various values of the angle of incidence i and angle of refraction r for a ray entering the glass from air. They plot a graph of the sin r against sin i.

They determine the gradient of the graph to be m.

Which of the following gives the critical angle of the glass?

A.  sin⁻¹(m)

B.  sin⁻¹$\left(\frac{1}{m}\right)$

C.  m

D.  $\frac{1}{m}$