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SUN RAYS AT DIFFERENT TIME OF THE DAY

Jun 02,2020

SUN RAYS AT DIFFERENT TIME OF THE DAY

  • Hey Cubs you know that Earth moves on its axis throughout the day and that’s how we get day and night. But have you all Inquisitive Cubs ever wondered does the sun ray hit earth in the same way throughout the day time. Let’s set up this simple experiment to check ray’s length at different hour of the day.

    Hey Cubs you know that Earth moves on its axis throughout the day and that’s how we get day and night. But have you all Inquisitive Cubs ever wondered does the sun ray hit earth in the same way throughout the day time. Let’s set up this simple experiment to check ray’s length at different hour of the day.

    MATERIALS REQUIRED

    • Full plate
    • Card Board
    • Paints – light yellow & dark yellow or orange
    • Paint brush
    • Blue tack
    • Ruler
    • Dark black color pencil
    • Small stone
    • Straw
    • Scissors

    PRECAUTIONARY ADVICE

    Don’t look directly at the Sun, this can result in partial or full eye damage.

    INSTRUCTIONS

    1. Take a full plate and trace the round on a card board and under the supervision of an adult cut the round.
    2. You can paint the round board piece in light yellow color.
    3. Once the board is dried make a shape of the Sun at the center. The sun shape should be big enough to look attractive.
    4. Put a lump of blue tack in the middle of the circle. Cut the straw into half and push it into the blue tack.
    5. Now put the circle in a sunny place outside, where it won’t be overshadowed by buildings or trees.
    6. Use a ruler to draw a line where the straw’s shadow falls. Check the time and mark it on line.
    7. Repeat this for different hours like you may check at 10 am then an hour later 11 am. Then you can check at 12 noon and continue checking at an interval of an hour. Remember not to move the circle while marking keep it exactly the same position.
    8. Every hour marks the new position of the shadow of the straw on the board. You will notice that the shadow will change position and length during different hours of the day.
    9. You could also add some glitter to make your Sun circle look attractive.

    CONCLUSION

    So, what’s exactly is happening here?  Cubs, as you are aware that Earth spins during the day, the Sun appears to move in the sky. The shadows you will observe is longer before and after noon. This is because the Sun is lower in the sky. However, at noon or midday the Sun is at its highest point resulting in shorter straw shadows. The Sun circle works a bit like sundial. Sundial was used by people in earlier times to tell the time before the clocks were invented. To show the time accurately the straw part has to be set at an angle depending on the time of the year and your location in the world.