The earth takes \(24~\text{h}\) to rotate once about its axis. How much time does the sun take to shift by \(1^{\circ}\) when viewed from the earth?
1. \(3~\text{minutes}\)

2. \(2~\text{minutes}\)

3. \(1~\text{minutes}\)

4. \(4~\text{minutes}\)

Subtopic:  Refraction at Curved Surface |
 60%
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

Light from a point source in the air falls on a convex spherical glass surface (n = 1.5 and radius of curvature = 20 cm) of a glass medium which extends till infinity on other side . The distance of the light source from the glass surface is 100 cm. At what position the image is formed?

1. at a distance of 200 cm from the glass surface, in the direction of incident light.
2. at a distance of 100 cm from the glass surface, in the direction of incident light.
3. at a distance of 200 cm from the glass surface, in the opposite direction of incident light.
4. at a distance of 100 cm from the glass surface, in the opposite direction of incident light.

 

Subtopic:  Refraction at Curved Surface |
 66%
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NEET 2023 - Target Batch - Aryan Raj Singh
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A magician during a show makes a glass lens with \(n=1.47\) disappear in a trough of liquid. What is the refractive index of the liquid? 
1. \( 1.47 \)
2. \( 1.33 \)
3. \(0.66 \)
4. \( 1.5\)

 

Subtopic:  Refraction at Curved Surface |
 78%
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
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To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh