Interactive Exercises 4

A low voltage power supply, a ray box with a single slit, a full circle protractor and a semi-circular glass block. Describe how to use the above apparatus to measure the critical angle of the semi-circular glass block.
Sequence the following steps into proper order and Select the proper type of Genre.
Read the incident angle from the protractor. This is the critical angle of the glass block.	Select StepStep 1Step 2Step 3Step 4Step 5Step 6
Direct a light ray into the glass block through the curved side toward its centre.	Select StepStep 1Step 2Step 3Step 4Step 5Step 6
The critical angle of the semi-circular glass block can be found by passing a light ray into the block.	Select StepStep 1Step 2Step 3Step 4Step 5Step 6
First, connect the ray box to the power supply and switch it on.	Select StepStep 1Step 2Step 3Step 4Step 5Step 6
Then vary the incident angle in the glass block until the refracted ray is parallel to the straight edge of the glass block.	Select StepStep 1Step 2Step 3Step 4Step 5Step 6
Put the semi-circular glass block onto the protractor such that the centre of the glass block coincides with the centre of the paper protractor.	Select StepStep 1Step 2Step 3Step 4Step 5Step 6
Type of Genre: Select Genre Casual Explanation Exposition Procedural Account Theoretical Explanation

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