True or False Questions

1. Color complementarity in visible light: green light and purple light are complementary to each other. (Incorrect) 2. Significant figures refer to the digits that can actually be measured during an experiment. Rounding 0.88745 to four digits according to the rules gives 0.8875. (Wrong) 3. White light is composed of a mixture of seven monochromatic lights. Among these monochromatic lights, red light has the shortest wavelength, while purple light has the longest wavelength. ( Wrong )

1. Color complementarity in visible light: green light and purple light are complementary to each other. (Mistake) Green and red are complementary colors. 2. Significant figures refer to the digits that can actually be measured during measurement. Rounding 0.88745 to four digits according to the rules gives 0.8875. (Wrong) When rounding, if the fifth digit is even, the value remains unchanged. 3. White light is composed of a mixture of seven different monochromatic lights. Among these monochromatic lights, red light has the shortest wavelength, while purple light has the longest wavelength. ( Wrong ) Red light has the longest wavelength, while violet light has the shortest wavelength. This post was last edited by brucehan on 2009-3-13 at 20:32.]

1. Color complementarity in visible light: green light and purple light are complementary to each other. (Incorrect) 2. Significant figures refer to the digits that can actually be measured during an experiment. Rounding 0.88745 to four digits according to the rules gives 0.8875. (Wrong) 3. White light is composed of a mixture of seven monochromatic lights. Among these monochromatic lights, red light has the shortest wavelength, while purple light has the longest wavelength. ( Wrong )

1. Color complementarity in visible light: green light and purple light are complementary to each other. (Yes) 2. Significant figures refer to the digits that can actually be measured during a measurement. Rounding 0.88745 to four digits according to the rules gives 0.8875. (Wrong) 3. White light is composed of a mixture of seven monochromatic lights. Among these monochromatic lights, red light has the shortest wavelength, while purple light has the longest wavelength. (Wrong) The first answer above is incorrect; please correct it.

1. Color complementarity in visible light: green light and purple light are complementary to each other. (Incorrect) 2. Significant figures refer to the digits that can actually be measured during an experiment. Rounding 0.88745 to four digits according to the rules gives 0.8875. (Wrong) 3. White light is composed of a mixture of seven monochromatic lights. Among these monochromatic lights, red light has the shortest wavelength, while purple light has the longest wavelength. ( Wrong )

Answer: 1. The colors of visible light are complementary to each other; green light and purple light are complementary colors. (Wrong). Yellow-green and purple are complementary colors to each other. 2. Significant figures refer to the digits that can actually be measured during an experiment. Rounding 0.88745 to four digits according to the rules gives 0.8875. (Wrong) When rounding, if the digit is 5, look at the next digit; for 3, white light is composed of a mixture of seven different monochromatic lights. Among these monochromatic lights, red light has the shortest wavelength, while purple light has the longest wavelength. ( Wrong ). Red light has the longest wavelength, while purple light has the shortest wavelength

1. Color complementarity in visible light: green light and purple light are complementary to each other. ( × ) 2. Significant figures refer to the digits that can actually be measured during a measurement. Rounding 0.88745 to four digits according to the rules gives 0.8875. (×) 3. White light is composed of a mixture of seven monochromatic lights. Among these monochromatic lights, red light has the shortest wavelength, while purple light has the longest wavelength. ( × )

1. Color complementarity in visible light: green light and purple light are complementary to each other. (Yes) 2. Significant figures refer to the digits that can actually be measured during an experiment. Rounding 0.88745 to four digits according to the rules gives 0.8875. (Wrong) 3. White light is composed of a mixture of seven monochromatic lights. Among these monochromatic lights, red light has the shortest wavelength, while purple light has the longest wavelength. ( Wrong )

1. Color complementarity in visible light: green light and purple light are complementary to each other. (Incorrect) 2. Significant figures refer to the digits that can actually be measured during an experiment. Rounding 0.88745 to four digits according to the rules gives 0.8875. (Wrong) 3. White light is composed of a mixture of seven monochromatic lights. Among these monochromatic lights, red light has the shortest wavelength, while purple light has the longest wavelength. ( Wrong )

1. Color complementarity in visible light: green light and purple light are complementary to each other. ( × ) 2. Significant figures refer to the digits that can actually be measured during a measurement. Rounding 0.88745 to four digits according to the rules gives 0.8875. (×) 3. White light is composed of a mixture of seven monochromatic lights. Among these monochromatic lights, red light has the shortest wavelength, while purple light has the longest wavelength. ( × )

1. Color complementarity in visible light: green light and purple light are complementary to each other. (Incorrect) Green and magenta are complementary colors, but magenta is not present in the color spectrum; therefore, it is called an out-of-spectrum color. 2. Significant figures refer to the digits that can actually be measured during an experiment. Rounding 0.88745 to four digits according to the rules gives 0.8875. (Wrong) The correct answer should be 0.8874. 3. White light is composed of a mixture of seven different monochromatic lights. Among these monochromatic lights, red light has the shortest wavelength, while purple light has the longest wavelength. ( Wrong ) Red light has the longest wavelength, while violet light has the shortest wavelength

Answer: 1. Correct). 2. Wrong ) Round 5 by looking at the tens digit. 3. Wrong ). Red light has the longest wavelength, while purple light has the shortest wavelength

1. Color complementarity in visible light: green light and purple light are complementary to each other. (Incorrect) 2. Significant figures refer to the digits that can actually be measured during an experiment. Rounding 0.88745 to four digits according to the rules gives 0.8875. (Wrong) 3. White light is composed of a mixture of seven monochromatic lights. Among these monochromatic lights, red light has the shortest wavelength, while purple light has the longest wavelength. ( Wrong )

1. True (Green light and purple light are complementary colors; when light of two such colors is mixed in the appropriate intensity ratios, white light is produced, and these two colors are considered complementary colors.) Yellow is complementary to blue, cyan is complementary to red, and orange is complementary to cyan and blue. ) 2. Wrong (when rounding, if the digits do not form a pair and the trailing digit is 5, it is necessary to determine whether the last retained digit is odd or even; if the digit before 5 is even, then 5 should be dropped, while if the digit before 5 is odd, then 5 should be carried over). ) 3. Ultraviolet light: less than 400nm; visible light – (violet light: 400–450nm ； Blue light: 450–480nm ； Blue light: 480–490nm ； Blue-green: 490–500nm ； Green light: 500—560nm ； Yellow-green: 560–800nm ； Yellow: 580—600 ； Orange: 600—650 ； Red light: 650–760nm ； ) Infrared: greater than 760nm.

1. True (Green light and purple light are complementary colors; when light of two such colors is mixed in the appropriate intensity ratios, white light is produced, and these two colors are considered complementary colors.) Yellow is complementary to blue, cyan is complementary to red, and orange is complementary to cyan and blue. ) 2. Wrong (when rounding, if the digits do not form a pair and the trailing digit is 5, it is necessary to determine whether the last retained digit is odd or even; if the digit before 5 is even, then 5 should be dropped, while if the digit before 5 is odd, then 5 should be carried over). ) 3. Wrong (red light has the longest wavelength, while purple light has the shortest wavelength.) (Wavelength of purple light: 400–450 nm ； Red light wavelength: 650–760nm).

My answer: 1. (Wrong) 2. (Wrong) 3. (Wrong)

1. Color complementarity in visible light: green light and purple light are complementary to each other. (X) Green and red are complementary colors. 2. Significant figures refer to the digits that can actually be measured during measurement. Rounding 0.88745 to four digits according to the rules gives 0.8875. (X) Round up when the fifth digit is even. 3. White light is composed of a mixture of seven monochromatic lights. Among these monochromatic lights, red light has the shortest wavelength, while purple light has the longest wavelength. ( X ) Red light has the longest wavelength, while violet light has the shortest wavelength

1. Color complementarity in visible light: green light and purple light are complementary to each other. (×) 2. Significant figures refer to the digits that can actually be measured during measurement. Rounding 0.88745 to four digits according to the rules gives 0.8875. (×) 3. White light is composed of a mixture of seven monochromatic lights. Among these monochromatic lights, red light has the shortest wavelength, while purple light has the longest wavelength. (×)

1. Color complementarity in visible light: green light and purple light are complementary to each other. ………………(Wrong) 2. Significant figures refer to the digits that can actually be measured during an experiment. Rounding 0.88745 to four digits according to the rules gives 0.8875. ………………(Wrong) 3. White light is composed of a mixture of seven monochromatic lights. Among these monochromatic lights, red light has the shortest wavelength, while purple light has the longest wavelength. ………………(Mistake)