Optics and Light Quiz

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20 Questions

Define Ray in the context of optics.

An imaginary line which tells us about the propagation of light energy

What is the limit of resolution for human eye?

1÷60°

What is the wavelength range for visible light?

4000 to 8000 Angstrom

What does a source of light do?

Emits light energy and enables other objects to be visible

What is shadow in the context of optics?

When the path of light ray is obstructed by an opaque object

According to the given text, what is the formula for magnification?

$m = \frac{h_i}{h_o}$

In the context of reflection, what is defined with the help of the incident ray?

Real object

What is the net angle of deviation due to 2 inclined plane mirrors when the angle of incidence is less than the angle of inclination?

$\Delta = 360 - 2\theta$

Why does the graph of angle of deviation and angle of incidence not touch the X-axis according to the given text?

Because angle of deviation cannot be zero

How many reflections are suffered due to deviation due to 2 inclined plane mirrors when the angle of incidence is less than the angle of inclination?

Two reflections

What is the wavelength range for visible light?

4000 to 8000 Angstrom

What is the limit of resolution for the human eye?

One minute or 1÷60°

What does a source of light do?

Emits light energy

Define Ray in the context of optics.

An imaginary line describing the propagation of light energy

What is shadow in the context of optics?

An area where light is partially obstructed

What is the angle of deviation when two plane mirrors are perpendicular to each other?

180°

If the angle of incidence is less than the angle of inclination, how many reflections are formed due to 2 inclined plane mirrors?

Three reflections

What happens when the incident ray and the final reflected ray are antiparallel to each other in the case of two plane mirrors?

The angle of deviation is zero

What is the net angle of deviation due to 2 inclined plane mirrors when the angle of incidence is less than the angle of inclination?

$360-2\theta$

Why does the graph of angle of deviation and angle of incidence not touch the X-axis?

Because the angle of deviation cannot be zero

Study Notes

Optics Fundamentals

  • A ray in optics is a line that represents the direction of light travel.

Light and Human Eye

  • The limit of resolution for the human eye is the minimum distance at which two objects can be distinguished as separate.
  • Visible light has a wavelength range of approximately 400-700 nanometers.

Light Source and Shadow

  • A source of light emits light energy.
  • A shadow is the dark region formed when an object blocks light from reaching a surface.

Magnification and Reflection

  • The formula for magnification is not provided in the given text.
  • In the context of reflection, the angle of incidence is defined with the help of the incident ray.

Plane Mirrors and Deviation

  • When two plane mirrors are inclined, the net angle of deviation is equal to the sum of the deviations produced by each mirror.
  • If the angle of incidence is less than the angle of inclination, the graph of angle of deviation and angle of incidence does not touch the X-axis because the angle of deviation is never zero.
  • In this case, the light suffers two reflections.
  • When two plane mirrors are perpendicular to each other, the angle of deviation is 180 degrees.
  • If the incident ray and the final reflected ray are antiparallel (opposite directions), the light has been rotated by 180 degrees.
  • When the angle of incidence is less than the angle of inclination, two reflections are formed due to the 2 inclined plane mirrors.

Test your knowledge of optics and light with this quiz covering topics such as the nature of light, visible light spectrum, human eye sensitivity, and ray optics.

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