Podcast
Play an AI-generated podcast conversation about this lesson
Questions and Answers
What is a periscope used for?
What is a periscope used for?
Allowing sailors to see what is on the surface of the ocean when a submarine is underwater.
Which picture correctly shows how light travels to allow the sailor to see the ship?
Which picture correctly shows how light travels to allow the sailor to see the ship?
- i (correct)
- ii
- iii
- iv
How are we able to see objects?
How are we able to see objects?
- When we can feel light rays
- When light rays are reflected into our eyes (correct)
- When light rays come from our eyes
- When the objects absorb light rays
Who can see the red flower without using the mirror?
Who can see the red flower without using the mirror?
Signup and view all the answers
Who can see the red flower in the mirror?
Who can see the red flower in the mirror?
Signup and view all the answers
Match the following: What is the source of light and what is the object?
Match the following: What is the source of light and what is the object?
Signup and view all the answers
Which statement is true?
Which statement is true?
Signup and view all the answers
Flashcards are hidden until you start studying
Study Notes
How We See Objects
- We see objects because light waves bounce, or reflect, off them, and this is called reflection.
- First, light travels in a straight line from a source, then hits an object, and finally, the reflected light travels in a straight line from the object to our eye.
- The eye has special cells that can sense different colors of light, and this information is sent to the brain, allowing us to see.
Light and Reflection
- Light travels in straight lines and cannot pass through walls.
- When light hits a mirror, it strikes the mirror at an angle and reflects off of it at the same angle.
- This is why what we see in a mirror depends on where we stand.
Angle and Reflection
- An acute angle is less than 90°, and an obtuse angle is greater than 90°.
- When light rays are reflected into our eyes, we can see objects.
Periscope and Mirrors
- A periscope uses two mirrors to allow sailors to see what is on the surface of the ocean even when a submarine is underwater.
- The correct picture of a periscope shows how light travels to allow the sailor to see the ship.
Mirror and Reflection
- When we look at ourselves in a mirror, the light strikes the mirror at an angle and reflects off of it at the same angle.
- This is why what we see in a mirror depends on where we stand.
Questions and Answers
- We are able to see objects because light rays are reflected into our eyes.
- A person can see a red flower without using a mirror if they are standing in the right position.
- A person can see a red flower in the mirror if they are standing in the right position and the light reflects off the mirror at the correct angle.
- The source of light is not the eyes, but rather external sources such as the sun, flashlight, or robot.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
