Locate a Shadow beyond an Opaque Object - Practice 1

In a simple straight-line light model, an opaque object blocks some light.

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In a simple straight-line light model, an opaque object blocks some light. The shadow forms on the side away from the light source. Use the stated left/right layout, not the time of day.

Worked example

A lamp is on the left of a block. A screen on the right can catch the block's shadow.

Ideal point lamp at left, opaque block in the middle, and screen at right. The block intercepts rays and casts a shadow on the screen beyond it, away from the lamp. Not to scale.

Would you believe it?

The Moon shines in our sky mainly by reflecting sunlight. Being bright to our eyes does not mean an object makes its own visible light.

Question 1 In drawing A, a lamp is to the left of an opaque block. On which side can a screen catch its shadow? right left inside the lamp

Question 2 In drawing B, a lamp is to the right of an opaque block. On which side can a screen catch its shadow? right inside the lamp left

Question 3 In drawing C, a lamp is to the left of an opaque block. On which side can a screen catch its shadow? inside the lamp right left

Question 4 In drawing D, a lamp is to the right of an opaque block. On which side can a screen catch its shadow? left right inside the lamp

Question 5 In drawing E, a lamp is to the left of an opaque block. On which side can a screen catch its shadow? left inside the lamp right

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