Physics Videos

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  1. What is the maximum value of the magnetic field 1.0 m away from a 100 W light bulb?

  2. An FM radio station broadcasts at 98.6 MHz. What is the wavelength of the radio waves? If the maximum electric field component of an electromagnetic wave is 600 V/M, what is the average intensity of the wave?

  3. What would be the force on your fingertip if you held it 1.0 m away from a 100 W light bulb? Assume a perfect reflector and use 1.0 cm\(^2\) as the area of your fingertip.

  4. You are looking into a shiny Christmas ornament (ball). The ball has a diameter of 8.0 cm. Where does your image appear to be if you are holding the ball 20 cm from your face? What is the magnification?

  5. A convex mirror in a store has a radius of curvature of 0.55 m. If a customer is 10 m from the mirror, where is the customer's image in the mirror? What is the magnification of the image of the image? What is the orientation of the image?

  6. A concave mirror has a focal length of 40 cm. Determine the object position for which the resulting image is upright and 4 times the size of the object.

  7. You want to form an image on a screen 10 m from a mirror. If the image is 7 times bigger than the object, what type of mirror do you need? What is the radius of curvature?

  8. An object is placed at a distance of 30 cm from a concave lens of focal length 15 cm, h\(_I\) = 2 cm. Determine the position of the image, the linear magnification, and h\(_0\).

  9. The image of a tree on a 35 mm color slide is 1.8 mm high. It is to be projected onto a screen 3.0 m from the slide and is to appear 493 mm high. What focal length is needed?

  10. Given an object height of 3 cm and a convex lens of focal length 10cm. Determine the position and size of the produced image if the object is placed at:

    A. 30 cm

    B. 5 cm

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