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Optics
Red light of 650 nm travels from air to water with an incident angle of 30 degree.The refraction index for air is 1.000293 and for water is 1.33, the speed of light in vacuum is 3x10^8 m/s. a) Find the frequency, wave length, and speed of the red light in the air; b) find the frequency, wave length, and speed of light of the red light in water; c) find the angle of the refraction
Optics
these are the values:So (cm) Si (cm)
15, 4.6
25, 4.3
35. 4.9
45. 3.9
3. A student has a convex lens of unknown focal length. He lights a candle in a darkened room and uses the
lens and moves the screen until he forms a sharp image and records the distance from the candle to the lens
and the distance from the lens to the screen. Below is a sketch of his set-up and his data.
(a) What type of image is formed and what orientation is it?
(b) Where is the image formed if the candle is placed 7 cm from the lens?
(c) Use ray tracing to make a sketch when the object is 7 cm from the lens.
(d) What effect would it have if only a shard of the same lens was used, instead of the entire lens?
15, 4.6
25, 4.3
35. 4.9
45. 3.9
3. A student has a convex lens of unknown focal length. He lights a candle in a darkened room and uses the
lens and moves the screen until he forms a sharp image and records the distance from the candle to the lens
and the distance from the lens to the screen. Below is a sketch of his set-up and his data.
(a) What type of image is formed and what orientation is it?
(b) Where is the image formed if the candle is placed 7 cm from the lens?
(c) Use ray tracing to make a sketch when the object is 7 cm from the lens.
(d) What effect would it have if only a shard of the same lens was used, instead of the entire lens?
Optics
Calculate the energy of a single photon of blue light with a wavelength of 4.63×102 nm.
Optics
A laser whose wavelength is λa = 4.7 × 10-7 m shines through a diffraction grating. The light hits a screen L
= 3 m away and fourth order maximum is detected 0.52 m on either side of the central maximum.
(a) What is the separation between the slits?
(b) What is the path difference from the diffraction grating to the fourth maximum, measured in meters?
(a) A new laser whose wavelength is λb = 6.3 × 10-7 m shines through the slits and both its fourth
maximums are labeled. What is the distance from the fourth order maximum using λa and the closest
fourth maximum using λb?
= 3 m away and fourth order maximum is detected 0.52 m on either side of the central maximum.
(a) What is the separation between the slits?
(b) What is the path difference from the diffraction grating to the fourth maximum, measured in meters?
(a) A new laser whose wavelength is λb = 6.3 × 10-7 m shines through the slits and both its fourth
maximums are labeled. What is the distance from the fourth order maximum using λa and the closest
fourth maximum using λb?
Optics
A ray of light is incident at an angle (α) on a planar end of a transparent cylindrical glass rod of refractive index (µ). Determine the least value of µ so that light entering the rod does not emerge from the curved surface of the rod irrespective of the angle α.
Optics
A light beam is being reflected by using two mirrors, as in a periscope used in submarines. If one of the mirrors rotates
by an angle θ, the reflected light will deviate from its original path by the angle
by an angle θ, the reflected light will deviate from its original path by the angle
Optics
A man runs towards a mirror at a speed 15 m/s The speed of the image relative to the man is?
Optics
An object is placed 10 cm in front of a convex mirror of focal length 4 cm. Find the image location by drawing a ray tracing diagram to scale. Verify your answer using the lens equation.
Optics
An object is placed 8 cm in front of a convex lens of focal length 6 cm. Find the image location by drawing a ray tracing diagram to scale. Verify your answer using the lens equation.
Optics
An object is placed 10 cm in front of a convex mirror of focal length 4 cm. Find the image location by drawing a ray tracing diagram to scale. Verify your answer using the lens equation
