แบบทดสอบรายวิชาวิทยาศาสตร์ (ว32101) ม.2 (หน่วยที่5เรื่องความสว่างและการมองเห็น)

The correct answer is "ห้องผ่าตัด" (Operating room). Operating rooms require the highest level of brightness in order for surgeons and medical staff to perform surgeries safely and accurately. The bright lighting helps to enhance visibility and minimize the risk of errors during surgical procedures.

Looking directly at a spotlight for a long time can be dangerous to the retina because the lens of the eye will focus the light onto the retina, causing damage to the retina.

When rod cells are stimulated by dim light, it enables us to see black and white images.

The statement is correct because cone cells in the eye are responsible for color vision and they require bright light to function properly. Cone cells are concentrated in the fovea, which is located in the center of the retina and is responsible for detailed vision. When there is ample light, cone cells can detect different wavelengths of light and transmit this information to the brain, allowing us to perceive different colors. Therefore, the statement is correct in stating that cone cells require bright light to differentiate between different colors.

Viewing a solar eclipse with the naked eye can damage the retina because the brightness during that time is strong enough to be harmful to the retina.

The statement is correct. Cone cells are photoreceptor cells in the retina of the eye that are responsible for color vision. There are three types of cone cells, each sensitive to a different range of wavelengths of light. One type is sensitive to blue light, another to green light, and the third to red light. This allows us to perceive a wide range of colors.

When the rod cells are stimulated by dim light, it allows us to see black and white images.

When in a dark place, rod cells work to enable vision of objects, while cone cells are unable to function.

The given statement suggests that looking at objects or things placed in the sun or on white sand can help preserve eyesight because retinol is stimulated. However, this statement is incorrect. Retinol, which is a form of vitamin A, is important for maintaining good vision. However, looking at objects in the sun or on white sand does not stimulate retinol production. In fact, excessive exposure to sunlight can be harmful to the eyes and may increase the risk of eye damage. Therefore, the correct answer is "ผิด" (incorrect).

The question is asking for the unit of brightness. The correct answer is "ลักซ์" which is the unit of luminance or brightness.

The given statement is incorrect. Rectangular cells are not more sensitive to low-intensity light. The shape of the cell does not affect its ability to differentiate colors or perceive light. The sensitivity to light is determined by the type of photoreceptor cells present in the retina, namely rods and cones. Cones are responsible for color vision and are more sensitive to bright light, while rods are more sensitive to low-intensity light. The shape of the cells does not play a role in this sensitivity.

หลอดฟลูออเรสเซนต์ขนาด 40 วัตต์ เป็นหลอดไฟที่มีอัตราการให้พลังงานแสงมากที่สุด เนื่องจากหลอดฟลูออเรสเซนต์มีประสิทธิภาพในการแปลงพลังงานไฟฟ้าเป็นแสงสูงกว่าหลอดไฟฟ้าแบบไส้ และใช้พลังงานไฟฟ้าขนาด 40 วัตต์ ซึ่งมากกว่าหลอดไฟฟ้าแบบไส้ขนาด 15 วัตต์ ซึ่งทำให้หลอดฟลูออเรสเซนต์ขนาด 40 วัตต์ เป็นคำตอบที่ถูกต้องที่สุด

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เซลล์รูปกรวยและเซลล์รูปแท่งจะอยู่ที่บริเวณที่ 6 ของนัยน์ตา

Reading in a very bright area does not cause the eye muscles to work harder than normal. In fact, reading in a well-lit environment is beneficial as it reduces eye strain and fatigue. Therefore, the statement that reading in a bright area causes the eye muscles to deteriorate quickly is incorrect.

The statement is incorrect because the retina consists of several types of cells, including photoreceptor cells (which detect light) and other types of cells such as bipolar cells and ganglion cells (which transmit signals to the brain). Therefore, it is not accurate to say that the retina only contains two types of cells: photoreceptor cells and light-receiving cells.

วิธีทำ F = 70% x 1000 = 700 ลูเมน
E = F
A
แทนค่า 350 = 700
A
A = 2 ตารางเมตร

The correct answer is 2 and 4 because the image on the retina appears smaller than the actual object (smaller in size) and the image is inverted (upside down) compared to the object.

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The correct answer is 1 because it is the only part of the iris that is covering the retina. The other parts of the iris are not positioned in a way that would allow them to adjust the amount of light that falls on the retina.

The explanation states that the method to calculate the brightness on the table is by using the formula E = F/A, where E is the brightness, F is the luminous energy, and A is the area. Given that F is 500 lm and A is 0.8 m2, substituting the values into the formula gives E = 500/0.8 = 625 lux. Therefore, the brightness on the table is 625 lux.

The question asks for the brightness on the floor of a classroom with dimensions of 4 meters wide, 5 meters long, and 3 meters high. The classroom has 12 light bulbs, each with a power of 40 watts and a luminous efficacy of 2700 lumens. The total luminous energy that falls on the floor is calculated by multiplying the luminous efficacy of each bulb by the number of bulbs and then dividing by the area of the room. The answer is 1,620 lux.